Asymmetric synthesis of 3,4-anti- and 3,4-syn-substituted aminopyrrolidines via lithium amide conjugate addition
作者:Stephen G. Davies、A. Christopher Garner、Euan C. Goddard、Dennis Kruchinin、Paul M. Roberts、Andrew D. Smith、Humberto Rodriguez-Solla、James E. Thomson、Steven M. Toms
DOI:10.1039/b704932c
日期:——
The diastereoselective conjugate addition of homochiral lithium amides to methyl 4-(N-allyl-N-benzylamino)but-2-enoate has been used as the key step in a simple and efficient protocol for the preparation of 3,4-substituted aminopyrrolidines. This protocol provides a complementary and stereoselective route to both anti- and syn-3-amino-4-alkylpyrrolidines as well as anti- and syn-3-hydroxy-4-aminopyrrolidines
高手性锂酰胺向4-(N-烯丙基-N-苄氨基)丁-2-烯酸甲酯的非对映选择性共轭加成已被用作制备3,4-取代的氨基吡咯烷酮的简单有效方法中的关键步骤。该协议通过β-氨基烯醇官能团在高de和ee方面为抗3和4-3-氨基-4-烷基吡咯烷酮和顺3-氨基4-烷基吡咯烷酮提供了互补和立体选择的途径。该方法学已被用于合成抗-(3S,4S)-和顺-(3R,4S)-3-甲氧基-4-(N-甲基氨基)吡咯烷。