A camphor-derived vinylsulfonium salt as a reagent for a cycloannulation
摘要:
A chiral, non-racemic vinylsulfonium salt 6 was prepared from camphorquinone in seven steps and reacted with indole-2-carboxaldehyde to give a tricyclic azido alcohol 2 in a 35% yield and 43% e.e. and a 43% recovery of the chiral sulfide. (C) 2001 Elsevier Science Ltd. All rights reserved.
Camphor derived 1,4-oxathianes for carbonyl epoxidation
摘要:
1,4-Oxathianes have been prepared in five steps from camphor and used to give stilbene oxides in excellent yield (81-100%) and with moderate enantioselectivity (54-64% ee). (C) 1998 Elsevier Science Ltd. All rights reserved.