Asymmetric Synthesis of Primary Amines by Nucleophilic Addition of Alkyllithium Compounds to Aldehyde SAMP/RAMP Hydrazones
作者:Dieter Enders、Christoph Nübling、Heinrich Schubert
DOI:10.1002/jlac.199719970608
日期:1997.6
temperature. Cleavage of the NN bond of the resulting hydrazines 3 and 8 with Raney-Ni/H2, or of the N-methoxycarbonylhydrazines 9 with Li/NH3, yield the amines 4 with 61–90% ee, the amines 11 with 45–96% de and 93 99% ee. The absolute configuration of the amines 11 was established by X-ray analysis of an appropriate MTPA derivative.
醛1或5被转换为SAMP腙2或α -烷基化的SAMP腙7和在低温下用有机锂化合物处理。所得肼的NN键的裂解3和8与阮内镍/ H 2,或的Ñ -methoxycarbonylhydrazines 9与Li / NH 3,得到胺4与61-90%ee的,胺11与45- 96%de和93 99%ee。通过对合适的MTPA衍生物进行X射线分析来确定胺11的绝对构型。