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 conjugateaddition 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
Lithium amide conjugate addition for the asymmetric synthesis of 3-aminopyrrolidines
作者:Stephen G. Davies、A. Christopher Garner、Euan C. Goddard、Dennis Kruchinin、Paul M. Roberts、Humberto Rodriguez-Solla、Andrew D. Smith
DOI:10.1039/b604835h
日期:——
Conjugateaddition of homochiral lithium amides to methyl 4-(N-benzyl-N-allylamino)but-2-enoate, chemoselective N-deprotection and concomitant cyclisation, followed by enolate functionalisation and deprotection allows access to syn- and anti-3,4-disubstituted aminopyrrolidines in > 98% d.e. and > 98% e.e.