[reaction: see text] Bicyclo[4.3.0]nonanes (hydrindanes) and bicyclo[3.3.0]octanes (octahydropentalenes) are easily synthesized by palladium-catalyzed cycloalkenylations. Additionally, benzo-fused bicyclo[3.3.0]octanes are prepared for the first time through intramolecular coupling between silyl enol ethers and aromatic rings in the presence of catalytic palladium acetate.
La cyclisation aldol d'un cetoester derive du bicyclo [3.3.0] octane, induite par TMSO Tf/Et 3 N conduit au squelette du capnellane
La 环化 aldol d'un cetoester 衍生 du bicyclo [3.3.0] 辛烷,induite par TMSO Tf/Et 3 N 导管 au scelette du capnellane
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
作者:Katsuji Kagechika、Masakatsu Shibasaki
DOI:10.1021/jo00013a004
日期:1991.6
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.