Asymmetric Heck reaction: a catalytic asymmetric synthesis of the key intermediate for .DELTA.9(12)-capnellene-3.beta.,8.beta.,10.alpha.-triol and .DELTA.9(12)-capnellene-3.beta.,8.beta.,10.alpha.,14-tetrol
摘要:
A catalytic asymmetric synthesis of the key intermediates 21 and 22 for the capnellenols has been achieved (80% ee) by an asymmetric Heck reaction followed by an anion capture process. Furthermore, an improved synthetic route to (+/-)-capnellenols has been also developed.
A catalytic asymmetricsynthesis of the keyintermediates 4 and 15 for the capnellenols has been achieved through an asymmetric Heck reaction followed by the acetate anion capture process. Furthermore, the above reaction has been successfully applied to an asymmetric Heck reaction -amine capture process.