Improved preparation of β-hydroxy-α-amino acids: direct formation of sulfates by sulfuryl chloride
摘要:
Two beta-(alkyl)-beta-hydroxy-alpha-amino acids [alkyl = But, BnO-(CH2)(3)-] have been synthesized by a sequence based on Sharpless asymmetric dihydroxylation. The key sulfate intermediates were prepared from enantiomerically enriched diols by direct treatment with sulfuryl chloride. The scope and the appropriate conditions for sulfate formation have also been studied. (c) 2005 Published by Elsevier Ltd.
1,2-Asymmetric induction in radical reactions. Deuteration and allylation reactions of β-oxy-α-bromo esters
作者:Dennis P. Curran、P.S. Ramamoorthy
DOI:10.1016/s0040-4020(01)80402-6
日期:1993.5
Chiral radicals were generated by halogen abstraction reactions of β-oxy-α-bromo esters and their asymmetric deuteration and allylationreactions were studied.