作者:J. Stephen Clark、Olivier Hamelin
DOI:10.1002/(sici)1521-3773(20000117)39:2<372::aid-anie372>3.0.co;2-y
日期:2000.1.17
trans-Fused tricyclic ethers containing combinations of six-, seven-, eight-, and nine-membered rings are constructed using two-directional double ring-closing metathesis reactions (see scheme). Such double cyclizations of precursors bearing alkenes, allylic ethers, enol ethers, or alkynyl ethers offer a new strategy for the synthesis of brevetoxins and ciguatoxins. PMB=(p-MeOC(6)H(4)CH(2)).
使用双向双闭环复分解反应(参见方案)构建包含六元,七元,八元和九元环组合的反式三环醚。带有烯烃,烯丙基醚,烯醇醚或炔基醚的前体的这种双环化提供了合成短毒素和西瓜毒素的新策略。PMB =(p-MeOC(6)H(4)CH(2))。