ARBUZOV B. A.; ZOBOVA N. N.; RUBINOVA N. R., IZV. AN CCCP. CEP. XIM. <IASK-A6>, 1976, HO 1, 202-04
作者:ARBUZOV B. A.、 ZOBOVA N. N.、 RUBINOVA N. R.
DOI:——
日期:——
Asymmetric Synthesis with 6-tert-Butyl-5-methoxy-6-methyl-3,6-dihydro-2H-1,4-oxazin-2-one as a New Chiral Glycine Equivalent: Preparation of Enantiomerically Pure α-Tertiary and α-Quaternary α-Amino Acids
作者:Claus-Jürgen Koch、Soňa Šimonyiová、Jörg Pabel、Annerose Kärtner、Kurt Polborn、Klaus Theodor Wanner
DOI:10.1002/ejoc.200390179
日期:2003.3
alkylation reactions with other systems with higher oxygen content. From the major diastereomers of both the mono- and the disubstituted derivatives of 2 the corresponding α-aminoacids 33a−c and 34a−d were obtained in high enantiomeric purity by hydrolytic cleavage of the oxazinone ring, accomplished either in two steps with aqueous TFA and aqueous NaOH or in one with either aqueous NaOH or 3 N HBr. Alkylation