Stereoselective anti-SN2′ Mitsunobu reaction of α-hydroxy-α-alkenylsilanes
摘要:
A novel silyl group-directed anti-S(N)2' reaction of allylic alcohols under Mitsunobu reaction conditions is described. The Mitsunobu reaction of alpha-hydroxy-alpha-alkenylsilanes with a TBS or TIPS group gave the anti-S(N)2' product, in which regio- and stereochemical outcomes of the reaction depended on the steric bulkiness of the silyl group. (C) 2010 Elsevier Ltd. All rights reserved.
Stereoselective anti-SN2′ Mitsunobu reaction of α-hydroxy-α-alkenylsilanes
摘要:
A novel silyl group-directed anti-S(N)2' reaction of allylic alcohols under Mitsunobu reaction conditions is described. The Mitsunobu reaction of alpha-hydroxy-alpha-alkenylsilanes with a TBS or TIPS group gave the anti-S(N)2' product, in which regio- and stereochemical outcomes of the reaction depended on the steric bulkiness of the silyl group. (C) 2010 Elsevier Ltd. All rights reserved.
Enantioselective Reduction of α,β-Unsaturated Acylsilanes by Chiral Lithium Amides
作者:Kei Takeda、Yuji Ohnishi、Toru Koizumi
DOI:10.1021/ol990574c
日期:1999.7.1
Reaction of beta-substituted acryloylsilanes I with lithium amides II affords a-silyl allylic alcohols III in high enantiomeric excess (>99%) via formal hydride transfer from the chiral lithium amide.
Stereoselective anti-SN2′ Mitsunobu reaction of α-hydroxy-α-alkenylsilanes
A novel silyl group-directed anti-S(N)2' reaction of allylic alcohols under Mitsunobu reaction conditions is described. The Mitsunobu reaction of alpha-hydroxy-alpha-alkenylsilanes with a TBS or TIPS group gave the anti-S(N)2' product, in which regio- and stereochemical outcomes of the reaction depended on the steric bulkiness of the silyl group. (C) 2010 Elsevier Ltd. All rights reserved.