A series of new protocols for regiodivergent and enantioselective coupling of 1,1-disubstituted allenes and aldehydes promoted by easily accessible Co complexes were developed. These processes represent the first example of transformations through enantioselective oxidative cyclization of allenes and aldehydes with diverse regioselectivities accurately controlled by chiral ligands.
开发了一系列用于 1,1-二取代丙二烯和醛的区域发散和对映选择性偶联的新方案,这些方案由易于获得的 Co 络合物促进。这些过程代表了通过手性配体精确控制的具有不同区域选择性的丙二烯和醛的对映选择性氧化环化转化的第一个例子。
Generation of Allylic Indium by Hydroindation of 1,3-Dienes and One-Pot Reaction with Carbonyl Compounds
作者:Naoki Hayashi、Hiroyuki Honda、Makoto Yasuda、Ikuya Shibata、Akio Baba
DOI:10.1021/ol061797n
日期:2006.9.1
A hydroindation of 1,3-dienes by dichloroindium hydride (HInCl2) generates allylic indiums that react with carbonyl or imine moieties in a one-pot treatment. The former reaction proceeds in a radical manner, and the latter is ionic allylation. Moreover, both reactions require no additives such as radical initiators, Lewis acids, or transition metal catalysts.