Cobalt-Catalyzed Hydroacylative Dimerization of Allenes Leading to Skipped Dienes
作者:Wei Ding、Yan King Terence Ho、Yasuhiro Okuda、Christopher Kevin Wijaya、Zheng Hao Tan、Naohiko Yoshikai
DOI:10.1021/acs.orglett.9b02465
日期:2019.8.2
A cobalt–diphosphine catalyst has been found to promote a selective 1:2 coupling reaction between aldehydes and allenes to form β,δ-dialkylidene ketones, featuring skipped diene moieties, with high regioselectivities and stereoselectivities. The reaction is distinct from previously reported, rhodium-catalyzed aldehyde–allene 1:2 coupling to afford β,γ-dialkylidene ketones bearing 1,3-diene moieties
已发现钴-二膦催化剂可促进醛与烯丙基之间的选择性1:2偶联反应,形成β,δ-二亚烷基酮,具有跳过的二烯部分,具有较高的区域选择性和立体选择性。该反应与先前报道的铑催化的醛-丙二烯1:2偶联反应不同,从而得到带有1,3-二烯部分的β,γ-二亚烷基酮。目前的氢酰基二聚反应涉及独特的丙二烯/丙二烯氧化环化模式,以在丙二烯分子之间形成C1-C2键。