Reference

Synthesis and separation of diastereomers of thiomorpholinocarboxylates

Synthesis and separation of diastereomers of thiomorpholinocarboxylates. Eremeev, A.Several substances are used for example 1729-67-5 and 88422-73-5 which are their cas registry numbers. V.; Nurdinov, R.; Liepins, E.; Polyak, F. D. (Inst. Org. Sint., Riga 226006, USSR). Khim. Geterotsikl. Soedin., (10), 1357-8 (Russian) 1983. CODEN: KGSSAQ. ISSN: 0453-8234. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Treating BrCH2CHBrCO2Me (I) with L-cysteine.HCl Me ester in EtOH contg. Et3N gave 48% diastereomeric thiomorpholinedicarboxylates II which could be sepd. by high-performance liq. chromatog. Treating I with H2NCH2CH2SH gave 48% thiomorpholinecarboxylate III. .

Photoreduction and photodecarboxylation of pyruvic acid

Photoreduction and photodecarboxylation of pyruvic acid. Applications of CIDNP to mechanistic photochemistry. Closs, G. L.; Miller, R. J. (Dep. Chem., Univ. Chicago, Chicago, Ill., USA). J. Am. Chem. Soc., 100(11), 3483-94 (English) 1978. CODEN: JACSAT. ISSN: 0002-7863. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Detailed mechanisms for the redn. of n,p* triplet MeCOCO2H (I) by EtOH, Me2CHOH and MeCHO in MeCN were elucidated by ClDNP. Various geminate combination and disproportionation reactions, including the general formation of CH2:C(OH)CO2H, are obsd. The significance of escape reactions involving H exchange between ketyl radicals and ground-state I is demonstrated. With moderate concns. of EtOH, competitive abstraction from product MeCHO becomes important. Photodecarboxylation of n,p* triplet I in H2O and other nonreducing polar solvents is initiated via unimol. scission of the carbonyl-carboxy bond. Rapid redn. of ground-state I by carboxyl radicals followed by radical coupling yields MeCOCMe(OH)CO2H as the primary photoproduct in all solvents. 1729-67-5 which is the cas registry number of one of substances is just one of reagents here.Several reagents such as 1729-67-5 is used here. The rate coeff. for a-cleavage in MeCN is estd. as 1 ′ 106 s-1. All observations are explained with the radical-pair theory of CIDNP. ..