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Showing 1 to 12 of 157 entries
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Base-Mediated Cascade Substitution-Cyclization of 2H-Azirines: Access to Highly Substituted Oxazoles.

Organic letters

Duan X, Yang K, Lu J, Kong X, Liu N, Ma J.
PMID: 28605912
Org Lett. 2017 Jul 07;19(13):3370-3373. doi: 10.1021/acs.orglett.7b01305. Epub 2017 Jun 13.

A novel strategy to synthesize highly functionalized oxazoles has been successfully developed via a base-mediated intermolecular substitution between 2-acyloxy-2H-azirines and N-nucleophile or O-nucleophile with a subsequent ring expansion of a 2H-azirine intermediate. This method provides straightforward access to highly...

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Duan X, Yang K, Lu J, et al. Base-Mediated Cascade Substitution-Cyclization of 2H-Azirines: Access to Highly Substituted Oxazoles. Org Lett. 2017;19(13):3370-3373doi: 10.1021/acs.orglett.7b01305.
Duan, X., Yang, K., Lu, J., Kong, X., Liu, N., & Ma, J. (2017). Base-Mediated Cascade Substitution-Cyclization of 2H-Azirines: Access to Highly Substituted Oxazoles. Organic letters, 19(13), 3370-3373. https://doi.org/10.1021/acs.orglett.7b01305
Duan, Xiyan, et al. "Base-Mediated Cascade Substitution-Cyclization of 2H-Azirines: Access to Highly Substituted Oxazoles." Organic letters vol. 19,13 (2017): 3370-3373. doi: https://doi.org/10.1021/acs.orglett.7b01305
Duan X, Yang K, Lu J, Kong X, Liu N, Ma J. Base-Mediated Cascade Substitution-Cyclization of 2H-Azirines: Access to Highly Substituted Oxazoles. Org Lett. 2017 Jul 07;19(13):3370-3373. doi: 10.1021/acs.orglett.7b01305. Epub 2017 Jun 13. PMID: 28605912.
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Ruthenium-Catalyzed C-C Bond Cleavage of 2H-Azirines: A Formal [3+2+2] Cycloaddition to Fused Azepine Skeletons.

Angewandte Chemie (International ed. in English)

Li T, Xu F, Li X, Wang C, Wan B.
PMID: 26800151
Angew Chem Int Ed Engl. 2016 Feb 18;55(8):2861-5. doi: 10.1002/anie.201510820. Epub 2016 Jan 22.

2H-azirines can serve as three-atom synthons by C-C bond cleavage, however, it involves a high energy barrier under thermal conditions (>50.0 kcal mol(-1) ). Reported is a ruthenium-catalyzed [3+2+2] cycloaddition reaction of 2H-azirines with diynes, thus leading to the...

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Li T, Xu F, Li X, et al. Ruthenium-Catalyzed C-C Bond Cleavage of 2H-Azirines: A Formal [3+2+2] Cycloaddition to Fused Azepine Skeletons. Angew Chem Int Ed Engl. 2016;55(8):2861-5doi: 10.1002/anie.201510820.
Li, T., Xu, F., Li, X., Wang, C., & Wan, B. (2016). Ruthenium-Catalyzed C-C Bond Cleavage of 2H-Azirines: A Formal [3+2+2] Cycloaddition to Fused Azepine Skeletons. Angewandte Chemie (International ed. in English), 55(8), 2861-5. https://doi.org/10.1002/anie.201510820
Li, Tengfei, et al. "Ruthenium-Catalyzed C-C Bond Cleavage of 2H-Azirines: A Formal [3+2+2] Cycloaddition to Fused Azepine Skeletons." Angewandte Chemie (International ed. in English) vol. 55,8 (2016): 2861-5. doi: https://doi.org/10.1002/anie.201510820
Li T, Xu F, Li X, Wang C, Wan B. Ruthenium-Catalyzed C-C Bond Cleavage of 2H-Azirines: A Formal [3+2+2] Cycloaddition to Fused Azepine Skeletons. Angew Chem Int Ed Engl. 2016 Feb 18;55(8):2861-5. doi: 10.1002/anie.201510820. Epub 2016 Jan 22. PMID: 26800151.
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Electronically Mediated Selectivity in Ring Opening of 1-Azirines. The 3-Z Mode: Convenient Route to 2-Aza-1,3-dienes.

The Journal of organic chemistry

Barroso MT, Kascheres A.
PMID: 11674083
J Org Chem. 1999 Jan 08;64(1):49-53. doi: 10.1021/jo980198u.

Reaction of 1-azirine-3-methylacrylates 1a,b with imidazoles and pyrazoles under mild conditions results in the formation of 2-aza-1,3-dienes 2a-g containing a potential leaving group at the 1-position. Simple alcohols (methanol and ethanol) react similarly with 1a,b in the presence of...

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Barroso MT, Kascheres A. Electronically Mediated Selectivity in Ring Opening of 1-Azirines. The 3-Z Mode: Convenient Route to 2-Aza-1,3-dienes. J Org Chem. 1999;64(1):49-53doi: 10.1021/jo980198u.
Barroso, M. T., & Kascheres, A. (1999). Electronically Mediated Selectivity in Ring Opening of 1-Azirines. The 3-Z Mode: Convenient Route to 2-Aza-1,3-dienes. The Journal of organic chemistry, 64(1), 49-53. https://doi.org/10.1021/jo980198u
Barroso, Marcia T., and Kascheres, Albert. "Electronically Mediated Selectivity in Ring Opening of 1-Azirines. The 3-Z Mode: Convenient Route to 2-Aza-1,3-dienes." The Journal of organic chemistry vol. 64,1 (1999): 49-53. doi: https://doi.org/10.1021/jo980198u
Barroso MT, Kascheres A. Electronically Mediated Selectivity in Ring Opening of 1-Azirines. The 3-Z Mode: Convenient Route to 2-Aza-1,3-dienes. J Org Chem. 1999 Jan 08;64(1):49-53. doi: 10.1021/jo980198u. PMID: 11674083.
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Carbene and nitrene rearrangements: a theoretical study of cyclic allenes and carbenes, carbodiimides, and azirines.

The Journal of organic chemistry

Kuhn A, Vosswinkel M, Wentrup C.
PMID: 12467425
J Org Chem. 2002 Dec 13;67(25):9023-30. doi: 10.1021/jo0258756.

B3LYP/6-31G(d) calculations of structures, energies, and infrared spectra of several rearrangement products of (hetero)aromatic nitrenes and carbenes are reported. 3-Isoquinolylnitrene 36 ring closes to the azirine 37 prior to ring expansion to the potentially stable but unobserved seven-membered-ring carbodiimide...

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Kuhn A, Vosswinkel M, Wentrup C. Carbene and nitrene rearrangements: a theoretical study of cyclic allenes and carbenes, carbodiimides, and azirines. J Org Chem. 2002;67(25):9023-30doi: 10.1021/jo0258756.
Kuhn, A., Vosswinkel, M., & Wentrup, C. (2002). Carbene and nitrene rearrangements: a theoretical study of cyclic allenes and carbenes, carbodiimides, and azirines. The Journal of organic chemistry, 67(25), 9023-30. https://doi.org/10.1021/jo0258756
Kuhn, Arvid, et al. "Carbene and nitrene rearrangements: a theoretical study of cyclic allenes and carbenes, carbodiimides, and azirines." The Journal of organic chemistry vol. 67,25 (2002): 9023-30. doi: https://doi.org/10.1021/jo0258756
Kuhn A, Vosswinkel M, Wentrup C. Carbene and nitrene rearrangements: a theoretical study of cyclic allenes and carbenes, carbodiimides, and azirines. J Org Chem. 2002 Dec 13;67(25):9023-30. doi: 10.1021/jo0258756. PMID: 12467425.
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Reactivity of 2-halo-2H-azirines. 1. Reactions with nucleophiles.

The Journal of organic chemistry

Pinho e Melo TM, Lopes CS, Gonsalves AM, Beja AM, Paixão JA, Silva MR, da Veiga LA.
PMID: 11777440
J Org Chem. 2002 Jan 11;67(1):66-71. doi: 10.1021/jo010504v.

Nucleophilic substitution reactions of 2-halo-2H-azirines 1a, 1b, 1d, and 1e with potassium phthalimide and aniline allowed the preparation of new substituted 2H-azirines 2-5. The reactions of 2-bromo-2H-azirine 1a with methylamine led to the synthesis of alpha-diimines 7 and 8....

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Pinho e Melo TM, Lopes CS, Gonsalves AM, et al. Reactivity of 2-halo-2H-azirines. 1. Reactions with nucleophiles. J Org Chem. 2002;67(1):66-71doi: 10.1021/jo010504v.
Pinho e Melo, T. M., Lopes, C. S., Gonsalves, A. M., Beja, A. M., Paixão, J. A., Silva, M. R., & da Veiga, L. A. (2002). Reactivity of 2-halo-2H-azirines. 1. Reactions with nucleophiles. The Journal of organic chemistry, 67(1), 66-71. https://doi.org/10.1021/jo010504v
Pinho e Melo, Teresa M V D, et al. "Reactivity of 2-halo-2H-azirines. 1. Reactions with nucleophiles." The Journal of organic chemistry vol. 67,1 (2002): 66-71. doi: https://doi.org/10.1021/jo010504v
Pinho e Melo TM, Lopes CS, Gonsalves AM, Beja AM, Paixão JA, Silva MR, da Veiga LA. Reactivity of 2-halo-2H-azirines. 1. Reactions with nucleophiles. J Org Chem. 2002 Jan 11;67(1):66-71. doi: 10.1021/jo010504v. PMID: 11777440.
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Least-squares modal estimation of wrapped phases: application to phase unwrapping.

Applied optics

Arines J.
PMID: 12816324
Appl Opt. 2003 Jun 10;42(17):3373-8. doi: 10.1364/ao.42.003373.

Phase unwrapping continues to be an important step in those techniques that obtain the phase from Fourier transforms. We propose a fast two-dimensional phase-unwrapping algorithm that has been specially designed to be used as part of an iterative algorithm....

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Arines J. Least-squares modal estimation of wrapped phases: application to phase unwrapping. Appl Opt. 2003;42(17):3373-8doi: 10.1364/ao.42.003373.
Arines, J. (2003). Least-squares modal estimation of wrapped phases: application to phase unwrapping. Applied optics, 42(17), 3373-8. https://doi.org/10.1364/ao.42.003373
Arines, Justo. "Least-squares modal estimation of wrapped phases: application to phase unwrapping." Applied optics vol. 42,17 (2003): 3373-8. doi: https://doi.org/10.1364/ao.42.003373
Arines J. Least-squares modal estimation of wrapped phases: application to phase unwrapping. Appl Opt. 2003 Jun 10;42(17):3373-8. doi: 10.1364/ao.42.003373. PMID: 12816324.
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Estimation-induced correlations of the Zernike coefficients of the eye aberration.

Optics letters

Bará S, Prado P, Arines J, Ares J.
PMID: 16902647
Opt Lett. 2006 Sep 01;31(17):2646-8. doi: 10.1364/ol.31.002646.

The statistical properties of the estimated eye aberrations differ in general from the actual ones owing to the cross coupling and aliasing generated in the estimation process. In particular, the estimated Zernike aberration coefficients may show fictitious correlations that...

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Bará S, Prado P, Arines J, et al. Estimation-induced correlations of the Zernike coefficients of the eye aberration. Opt Lett. 2006;31(17):2646-8doi: 10.1364/ol.31.002646.
Bará, S., Prado, P., Arines, J., & Ares, J. (2006). Estimation-induced correlations of the Zernike coefficients of the eye aberration. Optics letters, 31(17), 2646-8. https://doi.org/10.1364/ol.31.002646
Bará, Salvador, et al. "Estimation-induced correlations of the Zernike coefficients of the eye aberration." Optics letters vol. 31,17 (2006): 2646-8. doi: https://doi.org/10.1364/ol.31.002646
Bará S, Prado P, Arines J, Ares J. Estimation-induced correlations of the Zernike coefficients of the eye aberration. Opt Lett. 2006 Sep 01;31(17):2646-8. doi: 10.1364/ol.31.002646. PMID: 16902647.
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Photochemistry of 2-(1-naphthyl)-2H-azirines in matrixes and in solutions: wavelength-dependent C-C and C-N bond cleavage of the azirine ring.

Journal of the American Chemical Society

Inui H, Murata S.
PMID: 15725019
J Am Chem Soc. 2005 Mar 02;127(8):2628-36. doi: 10.1021/ja040109x.

The photochemistry of 3-methyl-2-(1-naphthyl)-2H-azirine (1a) was investigated by the direct observation of reactive intermediates in matrixes at 10 K and by the characterization of reaction products in solutions. As already reported, the photolysis of the azirine 1a with the...

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Inui H, Murata S. Photochemistry of 2-(1-naphthyl)-2H-azirines in matrixes and in solutions: wavelength-dependent C-C and C-N bond cleavage of the azirine ring. J Am Chem Soc. 2005;127(8):2628-36doi: 10.1021/ja040109x.
Inui, H., & Murata, S. (2005). Photochemistry of 2-(1-naphthyl)-2H-azirines in matrixes and in solutions: wavelength-dependent C-C and C-N bond cleavage of the azirine ring. Journal of the American Chemical Society, 127(8), 2628-36. https://doi.org/10.1021/ja040109x
Inui, Hiroshi, and Murata, Shigeru. "Photochemistry of 2-(1-naphthyl)-2H-azirines in matrixes and in solutions: wavelength-dependent C-C and C-N bond cleavage of the azirine ring." Journal of the American Chemical Society vol. 127,8 (2005): 2628-36. doi: https://doi.org/10.1021/ja040109x
Inui H, Murata S. Photochemistry of 2-(1-naphthyl)-2H-azirines in matrixes and in solutions: wavelength-dependent C-C and C-N bond cleavage of the azirine ring. J Am Chem Soc. 2005 Mar 02;127(8):2628-36. doi: 10.1021/ja040109x. PMID: 15725019.
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Photochemistry of fluorinated 4-iodophenylnitrenes: matrix isolation and spectroscopic characterization of phenylnitrene-4-yls.

The Journal of organic chemistry

Grote D, Sander W.
PMID: 19778078
J Org Chem. 2009 Oct 02;74(19):7370-82. doi: 10.1021/jo901145h.

The photochemistry of a series of fluorinated p-iodophenyl azides 2 has been investigated using matrix isolation IR and EPR spectroscopy. In all cases, the corresponding phenylnitrenes 1 were formed as primary photoproducts. Further irradiation of the nitrenes 1 resulted...

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Grote D, Sander W. Photochemistry of fluorinated 4-iodophenylnitrenes: matrix isolation and spectroscopic characterization of phenylnitrene-4-yls. J Org Chem. 2009;74(19):7370-82doi: 10.1021/jo901145h.
Grote, D., & Sander, W. (2009). Photochemistry of fluorinated 4-iodophenylnitrenes: matrix isolation and spectroscopic characterization of phenylnitrene-4-yls. The Journal of organic chemistry, 74(19), 7370-82. https://doi.org/10.1021/jo901145h
Grote, Dirk, and Sander, Wolfram. "Photochemistry of fluorinated 4-iodophenylnitrenes: matrix isolation and spectroscopic characterization of phenylnitrene-4-yls." The Journal of organic chemistry vol. 74,19 (2009): 7370-82. doi: https://doi.org/10.1021/jo901145h
Grote D, Sander W. Photochemistry of fluorinated 4-iodophenylnitrenes: matrix isolation and spectroscopic characterization of phenylnitrene-4-yls. J Org Chem. 2009 Oct 02;74(19):7370-82. doi: 10.1021/jo901145h. PMID: 19778078.
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Reconfigurable Shack-Hartmann sensor without moving elements.

Optics letters

Martínez-Cuenca R, Durán V, Climent V, Tajahuerce E, Bará S, Ares J, Arines J, Martínez-Corral M, Lancis J.
PMID: 20436561
Opt Lett. 2010 May 01;35(9):1338-40. doi: 10.1364/OL.35.001338.

We demonstrate wavefront sensing with variable measurement sensitivity and dynamic range by means of a programmable microlens array implemented onto an off-the-shelf twisted nematic liquid crystal display operating as a phase-only spatial light modulator. Electronic control of the optical...

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Martínez-Cuenca R, Durán V, Climent V, et al. Reconfigurable Shack-Hartmann sensor without moving elements. Opt Lett. 2010;35(9):1338-40doi: 10.1364/OL.35.001338.
Martínez-Cuenca, R., Durán, V., Climent, V., Tajahuerce, E., Bará, S., Ares, J., Arines, J., Martínez-Corral, M., & Lancis, J. (2010). Reconfigurable Shack-Hartmann sensor without moving elements. Optics letters, 35(9), 1338-40. https://doi.org/10.1364/OL.35.001338
Martínez-Cuenca, Raúl, et al. "Reconfigurable Shack-Hartmann sensor without moving elements." Optics letters vol. 35,9 (2010): 1338-40. doi: https://doi.org/10.1364/OL.35.001338
Martínez-Cuenca R, Durán V, Climent V, Tajahuerce E, Bará S, Ares J, Arines J, Martínez-Corral M, Lancis J. Reconfigurable Shack-Hartmann sensor without moving elements. Opt Lett. 2010 May 01;35(9):1338-40. doi: 10.1364/OL.35.001338. PMID: 20436561.
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Closed-loop adaptive optics with a single element for wavefront sensing and correction.

Optics letters

Martínez-Cuenca R, Durán V, Arines J, Ares J, Jaroszewicz Z, Bará S, Martínez-León L, Lancis J.
PMID: 21931438
Opt Lett. 2011 Sep 15;36(18):3702-4. doi: 10.1364/OL.36.003702.

We propose a closed-loop adaptive optical arrangement based on a single spatial light modulator that simultaneously works as a correction unit and as the key element of a wavefront sensor. This is possible by using a liquid crystal on...

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Martínez-Cuenca R, Durán V, Arines J, et al. Closed-loop adaptive optics with a single element for wavefront sensing and correction. Opt Lett. 2011;36(18):3702-4doi: 10.1364/OL.36.003702.
Martínez-Cuenca, R., Durán, V., Arines, J., Ares, J., Jaroszewicz, Z., Bará, S., Martínez-León, L., & Lancis, J. (2011). Closed-loop adaptive optics with a single element for wavefront sensing and correction. Optics letters, 36(18), 3702-4. https://doi.org/10.1364/OL.36.003702
Martínez-Cuenca, Raúl, et al. "Closed-loop adaptive optics with a single element for wavefront sensing and correction." Optics letters vol. 36,18 (2011): 3702-4. doi: https://doi.org/10.1364/OL.36.003702
Martínez-Cuenca R, Durán V, Arines J, Ares J, Jaroszewicz Z, Bará S, Martínez-León L, Lancis J. Closed-loop adaptive optics with a single element for wavefront sensing and correction. Opt Lett. 2011 Sep 15;36(18):3702-4. doi: 10.1364/OL.36.003702. PMID: 21931438.
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Divergent reactivity of α-oximino carbenoids: facile access to 2-isoxazolines and 2H-azirines.

Chemical communications (Cambridge, England)

Qi X, Jiang Y, Park CM.
PMID: 21643598
Chem Commun (Camb). 2011 Jul 21;47(27):7848-50. doi: 10.1039/c1cc11683e. Epub 2011 Jun 06.

Mild catalytic reaction conditions for the synthesis of 2-isoxazolines and 2H-azirines have been developed via carbenoids derived from α-oximino diazo compounds. This has been utilized in the one-pot synthesis of pyrroles in the presence of 1,3-dicarbonyl compounds.

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Qi X, Jiang Y, Park CM. Divergent reactivity of α-oximino carbenoids: facile access to 2-isoxazolines and 2H-azirines. Chem Commun (Camb). 2011;47(27):7848-50doi: 10.1039/c1cc11683e.
Qi, X., Jiang, Y., & Park, C. M. (2011). Divergent reactivity of α-oximino carbenoids: facile access to 2-isoxazolines and 2H-azirines. Chemical communications (Cambridge, England), 47(27), 7848-50. https://doi.org/10.1039/c1cc11683e
Qi, Xinxin, et al. "Divergent reactivity of α-oximino carbenoids: facile access to 2-isoxazolines and 2H-azirines." Chemical communications (Cambridge, England) vol. 47,27 (2011): 7848-50. doi: https://doi.org/10.1039/c1cc11683e
Qi X, Jiang Y, Park CM. Divergent reactivity of α-oximino carbenoids: facile access to 2-isoxazolines and 2H-azirines. Chem Commun (Camb). 2011 Jul 21;47(27):7848-50. doi: 10.1039/c1cc11683e. Epub 2011 Jun 06. PMID: 21643598.
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Showing 1 to 12 of 157 entries