Cobalt-Catalyzed Regio- and Diastereoselective Formal [3 + 2] Cycloaddition between Cyclopropanols and Allenes
作者:Junfeng Yang、Qiao Sun、Naohiko Yoshikai
DOI:10.1021/acscatal.8b05114
日期:2019.3.1
reaction between a cyclopropanol and an allene via cyclopropanol ring opening, which affords a 3-alkylidenecyclopentanol derivative with high regio- and diastereoselectivities. The reaction tolerates monosubstituted, 1,1-disubstituted, and 1,3-disubstituted allenes and various functional groups. The reaction is proposed to proceed through carbometalation of the allene with a cobalt homoenolate followed by
已发现钴-二膦催化剂可通过环丙醇开环促进环丙醇和丙二烯之间的正式[3 + 2]环加成反应,从而提供具有高区域和非对映选择性的3-亚烷基环戊醇衍生物。该反应耐受单取代的,1,1-二取代的和1,3-二取代的烯丙基和各种官能团。提出该反应通过用烯均钴酸钴将丙二烯进行碳金属化,然后将所得烯丙基钴物质进行分子内羰基烯丙基化来进行。