A General Approach to (5<i>S</i>,6<i>R</i>)-6-Alkyl-5-benzyloxy-2-piperidinones: Application to the Asymmetric Syntheses of Neurokinin Substance P Receptor Antagonist (−)-L-733,061 and (−)-Deoxocassine
作者:Liang-Xian Liu、Yuan-Ping Ruan、Zheng-Qing Guo、Pei-Qiang Huang
DOI:10.1021/jo049166z
日期:2004.9.1
A general approach to (5S,6R)-6-alkyl-5-benzyloxy-2-piperidinones based on the regio- and diastereoselective reductive alkylation of (S)-3-benzyloxyglutarimide 7 is described. This method opens an entrance to chiral nonracemic substituted 3-piperidinols. The versatility of the method is illustrated by the asymmetric syntheses of neurokinin substance P receptor antagonist L-733,061 (ent-1), (−)-deoxocassine
描述了基于(S)-3-苄氧基戊二酰亚胺7的区域和非对映选择性还原烷基化的(5 S,6 R)-6-烷基-5-苄氧基-2-哌啶酮的一般方法。该方法为手性非外消旋取代的3-哌啶醇打开了大门。该方法的多功能性由神经激肽物质P受体拮抗剂L-733,061(ent- 1),(-)-去氧卡西汀(4)和HIV蛋白酶抑制剂(5a)的不对称合成说明。