Iridium-Catalyzed, Asymmetric Amination of Allylic Alcohols Activated by Lewis Acids
作者:Yasuhiro Yamashita、Apsara Gopalarathnam、John F. Hartwig
DOI:10.1021/ja0730718
日期:2007.6.1
enantioselective amination of allylic alcohols with Lewis acid activators to form branched allylic amine products is reported. The reactions of arylamines, benzylic amines, and secondary aliphatic amines in the presence of Nb(OEt)5 as activator occurred with high regioselectivities and high enantioselectivities. These results led to the development of Ir-catalyzed reactions of allylic alcohol with arylamines
报道了烯丙醇与路易斯酸活化剂的直接、Ir 催化、区域和对映选择性胺化反应,形成支链烯丙胺产物。在 Nb(OEt)5 作为活化剂存在下,芳胺、苄胺和脂肪仲胺的反应具有高区域选择性和高对映选择性。这些结果导致了烯丙醇与芳胺和 BPh3 作为催化量的活化剂的 Ir 催化反应的发展。这些反应是烯丙醇对映选择性取代的罕见例子。它们是烯丙醇取代以从单取代烯丙醇产生支化取代产物以及烯丙醇与胺亲核试剂的对映选择性取代的特别不寻常的例子。