has been developed using ruthenium on carbon catalyst, hydrogengas at atmospheric pressure, and deuterium oxide as a source of deuterium. The process was successfully scaled-up, avoiding the use of expensive and sensitive catalyst and avoiding the use of deuteriumgas under pressure. High deuterium incorporation and high yield of labeled compounds were obtained by a simple filtration process.
Enantiospecific CH Activation Using Ruthenium Nanocatalysts
作者:Céline Taglang、Luis Miguel Martínez-Prieto、Iker del Rosal、Laurent Maron、Romuald Poteau、Karine Philippot、Bruno Chaudret、Serge Perato、Anaïs Sam Lone、Céline Puente、Christophe Dugave、Bernard Rousseau、Grégory Pieters
DOI:10.1002/anie.201504554
日期:2015.9.1
The activation of CH bonds has revolutionized modern synthetic chemistry. However, no general strategy for enantiospecificCHactivation has been developed to date. We herein report an enantiospecificCHactivation reaction followed by deuterium incorporation at stereogenic centers. Mechanistic studies suggest that the selectivity for the α‐position of the directing heteroatom results from a four‐membered
Enantioselective synthesis of α-deuterium labelled chiral α-amino acids via dynamic kinetic resolution of racemic azlactones
作者:Joong-Suk Oh、Kyung Il Kim、Choong Eui Song
DOI:10.1039/c1ob06319g
日期:——
Catalytic dynamickineticresolution (DKR) of racemic azlactones with EtOD using squaramide-based dimeric cinchona alkaloid organocatalysts is shown to be a highly effective strategy for the preparation of enantiomerically pure α-deuterated chiral α-amino acids.
Penicillin biosynthesis the immediate origin of the sulphur atom
作者:Jack E. Baldwin、Robert M. Adlington、H-H. Ting、Duilio Arigoni、Paul Graf、Bruno Martinoni
DOI:10.1016/s0040-4020(01)96685-2
日期:1985.1
A mixture of tripeptide isotopomers δ-(L-α-aminoadipyl)-L-cystelnyl-D [2-2H]-valine and δ-(L-α-aminoadipyl)-L-(34S-cysteinyl)-D-valine were converted by the enzyme isopenicillin-N-synthetase into isopenicillin N. The distribution of the 2H and 34S in this product, determined by mass spectrometry, showed there was no transfer of the sulphur between the precursor molecules during conversion to penicillin
Asymmetric Synthesis of α-Deuterated α-Amino Acids through Nonenzymatic Transamination Reaction and the Determination of Their Enantiomeric Excesses
作者:Yoji Tachibana、Makoto Ando、Hiroyoshi Kuzuhara
DOI:10.1246/bcsj.56.3652
日期:1983.12
acids were prepared in methano-d through Zn2+-catalyzed transamination reaction between the chiral pyridoxamine analogs, (R)- or (S)-15-aminomethyl-14-hydroxy-5,5-dimethyl-2,8-dithia[9] (2,5)pyridinophane and various α-keto acids with enantiomeric excesses ranging from 40 to 94%. Aliphatic α-keto acids gave α-deuterated α-amino acids, whereas aromatic ones possessing a methylene group between the carbonyl