Mn-salen catalyzed nitrene transfer reaction: Enantioselective imidation of alkyl aryl sulfides
作者:Hisashi Nishikori、Chisa Ohta、Eva Oberlin、Ryo Irie、Tsutomu Katsuki
DOI:10.1016/s0040-4020(99)00853-4
日期:1999.12
Enantioselective imidation of alkyl aryl sulfides was achieved by using (R,R)- or (R,S)-Mn-salen complex [(R,R)-3 or (R,S)-3] as a catalyst. The optimum reaction conditions are dependent upon the substrates examined. For example, the imidation of alkyl phenyl sulfides with PhI=NTs using Mn-salen complex (R,R)-3 as a catalyst in the presence of N-methylmorpholine N-oxide showed high enantioselectivity
通过使用(R,R)-或(R,S)-Mn-salen络合物[(R,R)-3或(R,S)-3]作为催化剂,实现烷基芳基硫醚的对映选择性酰亚胺化。最佳反应条件取决于所检查的底物。例如,在N-甲基吗啉N存在下,使用Mn-salen配合物(R,R)-3作为催化剂,用PhI = NTs烷基化烷基苯硫醚。氧化物显示出高对映选择性(高达89%ee)。另一方面,在不存在N-甲基吗啉N-氧化物的情况下,通过使用Mn-salen配合物(R,S)-3作为催化剂,进行了甲基2,4-二硝基苯硫醚的反应(97%ee)。