SHORT AND EFFICIENT ENANTIOSELECTIVE SYNTHESIS OF CIS AND TRANS PYRROLIDINE-2,5-DICARBOXYLIC ACIDS

被引:28
作者
EZQUERRA, J [1 ]
RUBIO, A [1 ]
PEDREGAL, C [1 ]
SANZ, G [1 ]
RODRIGUEZ, JH [1 ]
RUANO, JLG [1 ]
机构
[1] UNIV AUTONOMA MADRID,DEPT QUIM ORGAN,E-28049 MADRID,SPAIN
关键词
PYROGLUTAMATE; REGIOSELECTIVE REACTIONS; LITHIUM METHYL PARA-TOLYLSULFINYL ANION; 5-CARBOXY-L-PROLINE; 5-OXO-L-PIPECOLIC ACID; PUMMERER REACTION;
D O I
10.1016/S0040-4039(00)74065-2
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
N-BOC-ethyl pyroglutamate 1 undergoes nucleophilic ring opening with lithium methyl p-tolyl sulfinyl anion delivering the p-tolylketosulfoxide 2.Treatment of 2 with TFA gave rise to a mixture of thioesters 3a,3b. The hydrolysis of 3b afforded the (2S, 5S) pirrolidine-2,5 dicarboxylic acid 5, a constituent of the red Alga Schizymenia dubyi. Under Pummerer reaction conditions (TFAA/Pyr), 2 yielded the 5-oxo-L-pipecolic acid derivative 6.
引用
收藏
页码:4989 / 4992
页数:4
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