Cobalt(I)-Catalyzed Reductive Cyclization of Enynes and Diynes Using Hydrogen Gas as a Reductant
作者:Kaho Isoda、Yoshihiro Sato
DOI:10.1021/acs.orglett.3c00524
日期:2023.3.31
Reductivecyclization of enynes and diynes by using H2 gas as a reductant was realized, and the corresponding cyclized products were obtained in good yields without olefin isomerization and over-reduction of the products. By an experiment using D2 instead of H2, it was confirmed that H2 unambiguously operates as a reductant in this reaction. The protocol of the reaction is very economical and user-friendly
实现了以H 2气为还原剂的烯炔和二炔的还原环化反应,并以良好的收率得到相应的环化产物,且没有发生烯烃异构和产物的过度还原。通过使用D 2代替H 2 的实验,确认了H 2在该反应中明确地作为还原剂起作用。该反应方案非常经济且用户友好,使用对空气和水分稳定的 CoBr 2 ·6H 2 O 和 1 个大气压的 H 2。