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Crystal structure of tert-butyl-N-phenyl-carbonitrilium tetra-chlorido-aluminate.

Acta crystallographica. Section E, Structure reports online

van Dijk T, Zant DW, Wolf R, Lammertsma K, Slootweg JC.
PMID: 25484737
Acta Crystallogr Sect E Struct Rep Online. 2014 Oct 11;70:331-3. doi: 10.1107/S1600536814022028. eCollection 2014 Nov 01.

In the title compound, (C11H14N)[AlCl4], the nitrilium (systematic name: 2,2-dimethyl-N-phenyl-propane-nitrilium) ion adopts a slightly distorted linear configuration [C-N C = 178.87 (16) and N C-C = 179.13 (17)°]. In the crystal, while there are no inter-molecular hydrogen bonds, pairs...

Effects of erlotinib therapy on [(11)C]erlotinib uptake in EGFR mutated, advanced NSCLC.

EJNMMI research

Bahce I, Yaqub M, Errami H, Schuit RC, Schober P, Thunnissen E, Windhorst AD, Lammertsma AA, Smit EF, Hendrikse NH.
PMID: 26857779
EJNMMI Res. 2016 Dec;6(1):10. doi: 10.1186/s13550-016-0169-8. Epub 2016 Feb 09.

BACKGROUND: In non-small cell lung cancer (NSCLC) patients off erlotinib therapy, positron emission tomography (PET) using [(11)C]erlotinib distinguished epidermal growth factor receptor (EGFR) mutations from wild-type EGFR. However, tumor uptake of [(11)C]erlotinib during erlotinib therapy is unknown. Therefore, the...

Reaction of a complexed phosphinidene with 2,4,6-tri-tert-butyl-1,3,5-triphosphabenzene.

Chemistry (Weinheim an der Bergstrasse, Germany)

Vlaar MJ, Ehlers AW, Schakel M, Clendenning SB, Nixon JF, Lutz M, Spek AL, Lammertsma K.
PMID: 11560325
Chemistry. 2001 Aug 17;7(16):3545-50. doi: 10.1002/1521-3765(20010817)7:16<3545::aid-chem3545>3.0.co;2-0.

The terminal phosphinidene complex PhPW(CO)5 reacts with 2,4,6-tri-tert-butyl-1,3,5-triphosphabenzene to give two unexpected multicyclic organophosphorus compounds. One of them results from an initial 1,2-addition, followed by an intramolecular rearrangement. B3LYP/6-31G* calculations on simplified parent systems suggest that the reaction follows...

Addition of a phosphinidene complex to C=N bonds: P-ylides, azaphosphiridines, and 1,3-dipolar cycloadditions.

Chemistry (Weinheim an der Bergstrasse, Germany)

Vlaar MJ, Valkier P, de Kanter FJ, Schakel M, Ehlers AW, Spek AL, Lutz M, Lammertsma K.
PMID: 11560326
Chemistry. 2001 Aug 17;7(16):3551-7. doi: 10.1002/1521-3765(20010817)7:16<3551::aid-chem3551>3.0.co;2-m.

The terminal phosphinidene complex PhPW(CO)5 adds to the imine bond of PhHC=N-Ph to give 3-membered ring azaphosphiridines, which undergo ring-expansion with an additional imine to yield a set of four isomeric five-membered ring diazaphospholanes. Treatment with the diimines PhHC=N-(CH2)n-N=CHPh...

Vinylphosphirane-phospholene rearrangements: pericyclic [1,3]-sigmatropic shifts or not?.

Journal of the American Chemical Society

Bulo RE, Ehlers AW, Grimme S, Lammertsma K.
PMID: 12431122
J Am Chem Soc. 2002 Nov 20;124(46):13903-10. doi: 10.1021/ja027925u.

The conversion of "free" and Cr(CO)(5)-complexed 2-vinylphosphiranes into 3-phospholenes via [1,3]-sigmatropic shifts was studied with density functional theory and compared with the corresponding hydrocarbon system, that is, the vinylcyclopropane-cyclopentene rearrangement. All three systems behave similarly with subtle but important...

Norbornadiene-Quadricyclane Valence Isomerism for a Tetraphosphorus Derivative The Netherlands Organization for Scientific Research (NOW/CW) is acknowledged for partial support (A.L.S., M.L., K.L.), as are the NSERC of Canada for a scholarship (S.B.C.), and EPSRC for funding phosphaorganometallic chemistry at Sussex University (J.F.N.). Dr. H. Zappey is thanked for the HR-MS spectra and J. C. Slootweg for his initiative. .

Angewandte Chemie (International ed. in English)

Vlaar MJ, Ehlers AW, Schakel M, Clendenning SB, Nixon JF, Lutz M, Spek AL, Lammertsma K.
PMID: 12404432
Angew Chem Int Ed Engl. 2001 Dec 03;40(23):4412-4415. doi: 10.1002/1521-3773(20011203)40:23<4412::aid-anie4412>3.0.co;2-i.

No abstract available.

2-Phospha-4-silabicyclo[1.1.0]butane as a reactive intermediate.

Angewandte Chemie (International ed. in English)

Slootweg JC, De Kanter FJ, Schakel M, Ehlers AW, Gehrhus B, Lutz M, Mills AM, Spek AL, Lammertsma K.
PMID: 15221844
Angew Chem Int Ed Engl. 2004 Jun 28;43(26):3474-7. doi: 10.1002/anie.200454183.

No abstract available.

P-C dichotomy: divergent iron(-I)-mediated alkyne and phosphaalkyne cycloligomerisations.

Dalton transactions (Cambridge, England : 2003)

Wolf R, Ghavtadze N, Weber K, Schnöckelborg EM, de Bruin B, Ehlers AW, Lammertsma K.
PMID: 20104301
Dalton Trans. 2010 Feb 14;39(6):1453-6. doi: 10.1039/b923663p. Epub 2009 Dec 04.

In contrast to the recently reported cyclodimerisations of phosphaalkynes, alkynes preferably trimerise at the same low-valent iron(-I) centre.

C-C bond insertion of a complexed phosphinidene into 1,6-methano[10]annulene.

Chemistry (Weinheim an der Bergstrasse, Germany)

Bulo RE, Trion L, Ehlers AW, de Kanter FJ, Schakel M, Lutz M, Spek AL, Lammertsma K.
PMID: 15390134
Chemistry. 2004 Oct 25;10(21):5332-7. doi: 10.1002/chem.200400519.

Reaction of electrophilic phosphinidene complex [MePW(CO)5] with 1,6-methano-[10]annulene results in the sole formation of the isomeric C-C insertion products 6 c (main) and 6 d (minor). The single-crystal X-ray structure of the complexed 1,7-methano-3-phospha[11]annulene (6 c) shows a syn-W(CO)5...

Geminal phosphorus/aluminum-based frustrated lewis pairs: C−H versus C≡C activation and CO2 fixation.

Angewandte Chemie (International ed. in English)

Appelt C, Westenberg H, Bertini F, Ehlers AW, Slootweg JC, Lammertsma K, Uhl W.
PMID: 21425419
Angew Chem Int Ed Engl. 2011 Apr 18;50(17):3925-8. doi: 10.1002/anie.201006901. Epub 2011 Mar 21.

No abstract available.

Cerebral blood flow and glucose metabolism in healthy volunteers measured using a high-resolution PET scanner.

EJNMMI research

Huisman MC, van Golen LW, Hoetjes NJ, Greuter HN, Schober P, Ijzerman RG, Diamant M, Lammertsma AA.
PMID: 23168248
EJNMMI Res. 2012 Nov 20;2(1):63. doi: 10.1186/2191-219X-2-63.

BACKGROUND: Positron emission tomography (PET) allows for the measurement of cerebral blood flow (CBF; based on [15O]H2O) and cerebral metabolic rate of glucose utilization (CMRglu; based on [18 F]-2-fluoro-2-deoxy-d-glucose ([18 F]FDG)). By using kinetic modeling, quantitative CBF and CMRglu...

Positron Emission Tomography as a Method for Measuring Drug Delivery to Tumors in vivo: The Example of [(11)C]docetaxel.

Frontiers in oncology

van der Veldt AA, Smit EF, Lammertsma AA.
PMID: 23986880
Front Oncol. 2013 Aug 13;3:208. doi: 10.3389/fonc.2013.00208. eCollection 2013.

Systemic anticancer treatments fail in a substantial number of patients. This may be caused by inadequate uptake and penetration of drugs in malignant tumors. Consequently, improvement of drug delivery to solid tumors may enhance its efficacy. Before evaluating strategies...

Showing 1 to 12 of 134 entries