In(OTf)3-Catalyzed Cascade Cyclization for Construction of Oxatricyclic Compounds
摘要:
A highly diastereoselective cascade cyclization reaction has been developed for establishing a series of oxatricyclic compounds using Chan's diene and simple keto H alkynal substrates with only 1 mol % of In(OTf)(3) as the catalyst in 82-92% yields. The potential utility of this synthetic strategy has been demonstrated in model studies for the construction the core structures of 1 alpha,8 alpha:4 alpha,5 alpha-diepoxy-4,5-dihydroosmitopsin and cortistatin
A highly diastereoselective cascade cyclization reaction has been developed for establishing a series of oxatricyclic compounds using Chan's diene and simple keto H alkynal substrates with only 1 mol % of In(OTf)(3) as the catalyst in 82-92% yields. The potential utility of this synthetic strategy has been demonstrated in model studies for the construction the core structures of 1 alpha,8 alpha:4 alpha,5 alpha-diepoxy-4,5-dihydroosmitopsin and cortistatin