Synthesis of Cyclopentenols and Cyclopentenones via Nickel-Catalyzed Reductive Cycloaddition
作者:Aireal D. Jenkins、Ananda Herath、Minsoo Song、John Montgomery
DOI:10.1021/ja206722t
日期:2011.9.14
Strategies for the reductive cycloaddition of enals or enoates with alkynes have been developed. The enal-alkyne cycloaddition directly affords cyclopentenols, whereas the enoate-alkyne cycloaddition affords the analogous cyclopentenones. The mechanism of these processes likely involves formation and protonation of a metallacyclic intermediate. The general strategy provides a straightforward entry
已经开发了烯醛或烯酸酯与炔烃的还原环加成的策略。烯醛-炔环加成直接提供环戊烯醇,而烯酸酯-炔环加成提供类似的环戊烯酮。这些过程的机制可能涉及金属环中间体的形成和质子化。一般策略提供了从简单、稳定的 π 系统到五元环产品的直接入口。