Parallel Recognition by Kinetic Control with Imino Aldehyde Substrates that are Prone to Redistribution
作者:Akihiro Orita、Yoshifumi Nagano、Koichi Nakazawa、Junzo Otera
DOI:10.1002/1615-4169(200207)344:5<548::aid-adsc548>3.0.co;2-a
日期:2002.7
One-shot treatment of a mixture of Danishefsky diene 4 and tetraallyltin 8 with 3-formylbenzylidene imines 1 in the presence of Sc(OTf)3 catalyst provides a single product 13 as a result of exclusive Diels–Alder and allylation reactions on the imine and aldehyde functions, respectively. The chemoselectivities of the respective elementary reactions are improved in the parallel reaction, and the redistribution
在Sc(OTf)3催化剂存在下,用3-甲酰基亚苄基亚胺1与Danishefsky二烯4和四烯丙基8的混合物进行单次处理可得到单一产物13,这是由于独家Diels-Alder和亚胺上的烯丙基化反应所致醛分别起作用。在平行反应中改善了各个基本反应的化学选择性,并且完全抑制了由Sc(OTf)3容易诱导的底物1的重新分布,从而为简化多步化学过程提供了新的方案。