trichloroacetonitrile. The Overman's thermal rearrangement of 5a and 5b underwent with high diastereoselectivity to afford (Z)-allylic trichloroacetamide 6a and 6b, which in turn were converted to L- and D-alanine, respectively, by oxidative cleavage of the double bond and acid hydrolysis. The effectiveness of the present approach was assessed by using the simplest allylicalcohol system, i.e. (Z)- and
A divergent and highly enantioselective synthetic methodology not only for bothenantiomers of α-amino acids but for bothchirally deuterated glycines from a single starting material was developed by making use of stereocontrol with antiparallel double repulsion on the diacetone-D-glucos-3-ulose template.
Stereochemistry of the dihydrouracil dehydrogenase reaction in metabolism of uracil to β-alanine
作者:David Gani、Douglas W. Young
DOI:10.1039/c39830000576
日期:——
Samples of β-alanine stereospecifically labeled with deuterium in each of the four C–H bonds have been synthesized; these been used to show that, in the first step of uracilmetabolism, the pyrimidine is reduced by dihydrouracildehydrogenase with overall trans-addition of hydrogen at the si-face at C-6 and the si-face at C-5.
Facile synthesis of chiral glycine using -glucose as a chiral template
作者:Katsumi Kakinuma、Nobutaka Imamura、Yukiko Saba
DOI:10.1016/s0040-4039(00)87193-2
日期:1982.1
A facile synthetic method of chiral glycine and a new access to chiral acetic acid based on a concept of chirality transfer from glucose are described.
描述了一种简便的手性甘氨酸合成方法,以及一种基于葡萄糖的手性转移概念的新手性乙酸方法。
Steric course of N5,N10-methylenetetrahydrofolate formation from glycine by the glycine cleavage system in E. coli