Catalytic Asymmetric Addition of Alkyl and Aryl Alkynes to <i>N</i>-(Diphenylphosphinoyl)imines
作者:Jun Ying、Xue-Dan Wu、Danny Wang、Lin Pu
DOI:10.1021/acs.joc.6b01599
日期:2016.10.7
the asymmetric reaction of alkyl and aryl alkynes with N-(diphenylphosphinoyl)imines in the presence of Et2Zn and Ti(OiPr)4. It exhibits unprecedented high enantioselectivity (up to 85% ee) for a simple alkyl alkyne addition to the N-(diphenylphosphinoyl)imines. The easy removal of the N-(dipehenylphosphinoyl) protecting groups makes this method practically useful for the asymmetric synthesis of chiral
甲3,3'-二(1- diphenylmethylpiperazinyl)甲基H 8 BINOL化合物,(小号) - 11,由(的曼尼希型反应制备小号)-H 8 BINOL与多聚甲醛和1-(二苯基甲基)哌嗪。该化合物可在Et 2 Zn和Ti(O i Pr)4存在下催化烷基和芳基炔烃与N-(二苯基膦酰基)亚胺的不对称反应。对于N-(二苯基膦酰基)亚胺的简单烷基炔烃加成,它表现出空前的高对映选择性(高达85%ee)。轻松去除N-(二苯甲酰基膦酰基)保护基使得该方法对于手性炔丙基胺的不对称合成实际上是有用的。