A Concise Catalytic Route to the Marine Sesquiterpenoids (-)-Clavukerin A and (-)-Isoclavukerin A
作者:Stephan Knüppel、Victor O. Rogachev、Peter Metz
DOI:10.1002/ejoc.201001087
日期:2010.11
zed strategy, the enantiopure title hydroazulenes were prepared in only four steps from (S)- and (R)-citronellal, respectively. A catalyst-controlled diastereoselective Michael addition of these aldehydes to methyl vinyl ketone followed by chemoselective dibromoolefination and one-pot Wittig olefination/alkyne formation afforded the key dienynes that underwent regioselective domino metathesis to yield
使用组合的有机催化/金属催化策略,分别从(S)-和(R)-香茅醛仅通过四步即可制备对映纯的标题水蕈烯。这些醛与甲基乙烯基酮的催化剂控制的非对映选择性迈克尔加成,然后是化学选择性二溴烯烃化和一锅 Wittig 烯烃化/炔烃的形成,提供了关键的二炔,这些二炔经过区域选择性多米诺复分解反应产生目标天然产物。