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Showing 1 to 12 of 16 entries
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A two-dimensional oxamate- and oxalate-bridged Cu(II)Mn(II) motif: crystal structure and magnetic properties of (Bu4N)2[Mn2{Cu(opba)}2ox].

Inorganic chemistry

Marinho MV, Simões TR, Ribeiro MA, Pereira CL, Machado FC, Pinheiro CB, Stumpf HO, Cano J, Lloret F, Julve M.
PMID: 23855768
Inorg Chem. 2013 Aug 05;52(15):8812-9. doi: 10.1021/ic401038c. Epub 2013 Jul 15.

A new compound of formula (Bu4N)2[Mn2{Cu(opba)}2ox] (1) [Bu4N(+) = tetra-n-butylammonium cation, H4opba = 1,2-phenylenebis(oxamic acid), and H2ox = oxalic acid] has been synthesized and magneto-structurally investigated. The reaction of manganese(II) acetate, [Cu(opba)](2-), and ox(2-) in dimethyl sulfoxide yielded single...

Lactate dehydrogenase kinetics and inhibition using a microplate reader.

Biochemistry and molecular biology education : a bimonthly publication of the International Union of Biochemistry and Molecular Biology

Powers JL, Kiesman NE, Tran CM, Brown JH, Bevilacqua VL.
PMID: 21591107
Biochem Mol Biol Educ. 2007 Jul;35(4):287-92. doi: 10.1002/bmb.74. Epub 2007 Jul 03.

A lactate dehydrogenase (LDH) enzyme kinetics laboratory experiment has been developed in which students obtain kinetic data using a microplate spectrophotometer (reader). These instruments have the capability of reading absorbances of many samples in a very short time frame....

Modulation of 5-ALA-induced PpIX xenofluorescence intensities of a murine tumour and non-tumour tissue cultivated on the chorio-allantoic membrane.

Lasers in medical science

Ismail MS, Dressler C, Obele SS, Daskalaki A, Philipp C, Berlien HP, Weitzel H, Liebsch M, Spielmann H.
PMID: 20803329
Lasers Med Sci. 1997 Oct;12(3):218-25. doi: 10.1007/BF02765102.

Exogenous administration of 5-aminolaevulinic acid (5-ALA), an early precursor in haem synthesis, induces accumulation of endogenous photo-active porphyrins, particularly protoporphyrin IX (PpIX). Modulation of 5-ALA-induced PpIX-xenofluorescence intensities of a murine tumour and normal (non-tumour) tissue was studied in vivo...

Promotion of antiferromagnetic exchange interaction in multinuclear copper(ii) complexes via fused oxamato/oxamidato ligands.

Dalton transactions (Cambridge, England : 2003)

Weheabby S, Abdulmalic MA, Atzori M, Sessoli R, Aliabadi A, Rüffer T.
PMID: 30378625
Dalton Trans. 2018 Nov 22;47(45):16164-16181. doi: 10.1039/c8dt03691h.

Treatment of N,N'-bis(2-aminophenyl)oxalamide (bapoxH6, 1) with ethyl oxalyl chloride in THF afforded oxamide-N,N'-bis(o-phenylene oxamic acid ethyl ester) (L1H4Et2, 2), which was converted to 3 (oxamide-(o-phenylene oxamic acid ethyl ester)(o-phenylene-N1-methyloxalamide); L2H5EtMe) and 4 (oxamide-N,N'-bis(o-phenylene-N1-methyloxalamide); L3H6Me2) by the addition of appropriate...

Copper(II) assembling with bis(2-pyridylcarbonyl)amidate and N,N'-2,2-phenylenebis(oxamate).

Dalton transactions (Cambridge, England : 2003)

Simões TR, Mambrini RV, Reis DO, Marinho MV, Ribeiro MA, Pinheiro CB, Ferrando-Soria J, Déniz M, Ruiz-Pérez C, Cangussu D, Stumpf HO, Lloret F, Julve M.
PMID: 23450253
Dalton Trans. 2013 Apr 28;42(16):5778-95. doi: 10.1039/c3dt32949f.

We herein present the synthesis and X-ray structures of five copper(II) complexes of formulae [Cu(bpca)(CF3SO3)(H2O)]·H2O (1), [Cu(bpca)(Phpr)(H2O)]·3/2H2O (2), {[Cu(bpca)]2[Cu(opba)(H2O)]}·H2O (3), {[Cu(bpca)]2(H2opba)}2·6H2O (4) and [Cu(bpca)(EtH2opba)]n (5), where bpca = bis(2-pyridylcarbonyl)amidate, Phpr = 3-phenylpropionate, CF3SO3(−) = triflate (anion of the trifluoromethanesulphonic...

The formation of overlooked compounds in the reaction of methyl amine with the diethyl ester of o-phenylenebis(oxamic acid) in MeOH.

Dalton transactions (Cambridge, England : 2003)

Abdulmalic MA, Aliabadi A, Petr A, Kataev V, Rüffer T.
PMID: 23165342
Dalton Trans. 2013 Feb 07;42(5):1798-809. doi: 10.1039/c2dt32259e. Epub 2012 Nov 20.

The treatment of the diethyl ester of o-phenylenebis(oxamic acid) (opbaH(2)Et(2)) with 2/3 of an equivalent of MeNH(2) in MeOH does not result in the formation of the methyl ester of o-phenylene(N'-methyloxamide)(oxamic acid) (opooH(3)Me, 1) in pure state, as reported...

A Straightforward Approach toward Multifunctionalized Pyridazines via Imination/Electrocyclization.

Organic letters

Komkov AV, Komendantova AS, Menchikov LG, Chernoburova EI, Volkova YA, Zavarzin IV.
PMID: 26158207
Org Lett. 2015 Aug 07;17(15):3734-7. doi: 10.1021/acs.orglett.5b01718. Epub 2015 Jul 09.

A facile synthesis of functionalized 3-carbamide pyridazines starting from readily available chlorovinyl aldehydes and oxamic acid thiohydrazides via cascade imination/electrocyclization is reported. In the presence of p-toluenesulfuric acid, various ketones have been efficiently incorporated into the pyridazine derivatives through...

Magnetic superexchange interactions: trinuclear bis(oxamidato) versus bis(oxamato) type complexes.

Dalton transactions (Cambridge, England : 2003)

Abdulmalic MA, Aliabadi A, Petr A, Krupskaya Y, Kataev V, Büchner B, Zaripov R, Vavilova E, Voronkova V, Salikov K, Hahn T, Kortus J, Eya'ane Meva F, Schaarschmidt D, Rüffer T.
PMID: 25832847
Dalton Trans. 2015 May 07;44(17):8062-79. doi: 10.1039/c4dt03579h.

The diethyl ester of o-phenylenebis(oxamic acid) (opbaH2Et2) was treated with an excess of RNH2 in MeOH to cause the exclusive formation of the respective o-phenylenebis(N(R)-oxamides) (opboH4R2, R = Me , Et , (n)Pr ) in good yields. Treatment of...

Mononuclear lanthanide(III)-oxamate complexes as new photoluminescent field-induced single-molecule magnets: solid-state photophysical and magnetic properties.

Dalton transactions (Cambridge, England : 2003)

Vaz RCA, Esteves IO, Oliveira WXC, Honorato J, Martins FT, Marques LF, Dos Santos GL, Freire RO, Jesus LT, Pedroso EF, Nunes WC, Julve M, Pereira CLM.
PMID: 32749440
Dalton Trans. 2020 Nov 25;49(45):16106-16124. doi: 10.1039/d0dt02497j.

Implementing additional optical (luminescent) properties into the well-known class of single-molecule magnets (SMMs) is considered as a promising route toward obtaining the next generation of optomagnetic materials for quantum information storage and computing. Herein, we report a joint optical...

Magnetic Properties of a Series of Trinuclear Complexes (CuL)(2)Mn.xB (L Representing the Deprotonated Form of N-(4-Methyl-6-oxo-3-azahept-4-enyl)oxamic Acid and B Representing Respectively H(2)O (x = 5, 4.5, 3, 1), (CH(3))(2)SO (x = 2), and C(5)H(5)N (x = 4)). Crystal and Molecular Structure of (CuL)(2)Mn.2(CH(3))(2)SO.

Inorganic chemistry

Costes JP, Laurent JP, Sanchez JM, Varela JS, Ahlgren M, Sundberg M.
PMID: 11670139
Inorg Chem. 1997 Oct 08;36(21):4641-4646. doi: 10.1021/ic970372h.

A series of (Cu, Mn, Cu) complexes have been prepared and characterized. They may be described by the overall formula (CuL)(2)Mn.xB where L stands for the deprotonated form of N-(4-methyl-6-oxo-3-azahept-4-enyl)oxamic acid and B for respectively H(2)O (with x =...

An interplay between the spin density distribution and magnetic superexchange interactions: a case study of mononuclear [(n)Bu4N]2[Cu(opooMe)] and novel asymmetric trinuclear [Cu3(opooMe)(pmdta)2](NO3)2·3MeCN.

Dalton transactions (Cambridge, England : 2003)

Abdulmalic MA, Aliabadi A, Petr A, Krupskaya Y, Kataev V, Büchner B, Hahn T, Kortus J, Rüffer T.
PMID: 23059964
Dalton Trans. 2012 Dec 28;41(48):14657-70. doi: 10.1039/c2dt31802d.

Treatment of the diethyl ester of o-phenylenebis(oxamic acid) (opbaH(2)Et(2), 1) with 5/6 equivalent of MeNH(2) in abs. EtOH results in the exclusive formation of the ethyl ester of o-phenylene(N′-methyl oxamide)(oxamic acid) (opooH(3)EtMe, 2) in ca. 50% yield. Treatment of...

Visible-light photocatalyzed oxidative decarboxylation of oxamic acids: a green route to urethanes and ureas.

Chemical communications (Cambridge, England)

Pawar GG, Robert F, Grau E, Cramail H, Landais Y.
PMID: 30073222
Chem Commun (Camb). 2018 Aug 16;54(67):9337-9340. doi: 10.1039/c8cc05462b.

A sustainable metal-free route to urethanes and ureas based on a photocatalyzed oxidative decarboxylation of oxamic acids is described. The reaction includes in situ generation of an isocyanate from the oxamic acid, using an organic dye as a photocatalyst,...

Showing 1 to 12 of 16 entries