A Versatile Method for the Facile Synthesis of Enantiopure trans- and cis-2,5-Disubstituted Pyrrolidines
摘要:
Treatment of(2S)-1-O-benzylglycerol-2,3-bistrifiate (2) with the trilithiated species of chiral building blocks 5-7 provided 2,3,5-trisubstituted pyrrolidines that were subjected to reductive desulfonylation to give trans-2,5-disubstituted pyrrolidines 11-13, respectively. The same reaction sequence with the (2R)-bistriflate 4 and trilithiated 5 afforded the cia isomer 19. This two-step synthetic mehodology can furnish any one of the four possible diastereomers of enantiopure 2,5-disubstituted pyrrolidines in 60-72% overall yields.
A Versatile Method for the Facile Synthesis of Enantiopure trans- and cis-2,5-Disubstituted Pyrrolidines
摘要:
Treatment of(2S)-1-O-benzylglycerol-2,3-bistrifiate (2) with the trilithiated species of chiral building blocks 5-7 provided 2,3,5-trisubstituted pyrrolidines that were subjected to reductive desulfonylation to give trans-2,5-disubstituted pyrrolidines 11-13, respectively. The same reaction sequence with the (2R)-bistriflate 4 and trilithiated 5 afforded the cia isomer 19. This two-step synthetic mehodology can furnish any one of the four possible diastereomers of enantiopure 2,5-disubstituted pyrrolidines in 60-72% overall yields.
A Versatile Method for the Facile Synthesis of Enantiopure <i>trans-</i> and <i>cis</i>-2,5-Disubstituted Pyrrolidines
作者:Qian Wang、N. André Sasaki、Claude Riche、Pierre Potier
DOI:10.1021/jo991052d
日期:1999.11.1
Treatment of(2S)-1-O-benzylglycerol-2,3-bistrifiate (2) with the trilithiated species of chiral building blocks 5-7 provided 2,3,5-trisubstituted pyrrolidines that were subjected to reductive desulfonylation to give trans-2,5-disubstituted pyrrolidines 11-13, respectively. The same reaction sequence with the (2R)-bistriflate 4 and trilithiated 5 afforded the cia isomer 19. This two-step synthetic mehodology can furnish any one of the four possible diastereomers of enantiopure 2,5-disubstituted pyrrolidines in 60-72% overall yields.