Indium-Catalyzed [2 + 2] Cycloaddition of Allylsilanes to Internal Alkynones
摘要:
We have developed an indium-catalyzed [2 + 2] cydo-addition of allylsilanes to alkynones leading to selective cydobutenone formation. The resulting cydobutenones were readily converted to the oxidized products by Tamao-Fleming oxidation or the ring-opened products by an electrocyclic reaction.