作者:Andrea Gualandi、Giacomo Rodeghiero、Rossana Perciaccante、Thomas Paul Jansen、Cristina Moreno‐Cabrerizo、Charles Foucher、Marianna Marchini、Paola Ceroni、Pier Giorgio Cozzi
DOI:10.1002/adsc.202001250
日期:2021.2.16
The preparation of homoallylic alcohols by addition of organometallic allyl compounds to carbonyls is an important strategy in organic chemistry. Allylating organometallic cobalt species can be generated employing stoichiometric quantities of Zn acting as reductant. To avoid the employment of stoichiometric amount of Zn, we have developed an allylation reaction of aromatic and aliphatic aldehydes promoted
通过将有机金属烯丙基化合物加成羰基来制备均丙醇是有机化学中的重要策略。可以使用化学计量的锌作为还原剂来生成烯丙基化的有机金属钴物质。为了避免使用化学计量的Zn,我们开发了在钴络合物存在下通过光氧化还原催化促进的芳香族和脂肪族醛的烯丙基化反应,在此我们全面介绍了我们的研究。在大量CoBr 2(10摩尔%),4,4'-二叔丁基-2,2'-二吡啶基(dtbbpy,10摩尔%),乙酸烯丙酯(3当量),[Ir( dtbbpy)(ppy)2 ] PF 6(ppy = 2-苯基吡啶,2 mol%)和N,N-二异丙基乙胺(4当量)是醛的烯丙基化反应,产率中等至良好。报道了该新方法的底物范围,局限性和光物理研究。