A straightforward synthesis of both enantiomers of α-vinylalanine and α-ethynylalanine
摘要:
This report describes the synthesis of enantiomerically pure (S)- and (R)-alpha-vinylalanines and (S)- and (R)-alpha-ethynylalanines, four quaternary alpha-amino acids, using a straightforward synthetic route and starting from (S)- and (R)-N-Boc-N,O-isopropylidene-alpha-methylserinals. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
A straightforward synthesis of both enantiomers of α-vinylalanine and α-ethynylalanine
摘要:
This report describes the synthesis of enantiomerically pure (S)- and (R)-alpha-vinylalanines and (S)- and (R)-alpha-ethynylalanines, four quaternary alpha-amino acids, using a straightforward synthetic route and starting from (S)- and (R)-N-Boc-N,O-isopropylidene-alpha-methylserinals. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
Asymmetric Synthesis of Less Accessible α-Tertiary Amines from Alkynyl <i>Z-</i>
Ketimines
作者:Taichi Kano、Yusuke Aota、Keiji Maruoka
DOI:10.1002/anie.201710084
日期:2017.12.18
highly stereoselective synthesis of hitherto less accessible chiral α‐tertiary amines with multiple structurally similar linear carbon chains was achieved through chiral auxiliary mediated addition of organolithium reagents to the geometrically well‐controlled alkynyl Z‐ketimines. This stereoselective nucleophilic addition offers a general approach to the asymmetric synthesis of nitrogen‐containing