Diastereoselective Protonation of Lactam Enolates Derived from (<i>R</i>)-Phenylglycinol. A Novel Asymmetric Route to 4-Phenyl-1,2,3,4-tetrahydroisoquinolines
作者:Nicolas Philippe、Vincent Levacher、Georges Dupas、Guy Quéguiner、Jean Bourguignon
DOI:10.1021/ol0057939
日期:2000.7.1
Highly diastereoselective protonation of chiral lactam enolates of 4-substituted-1,4-dihydroisoquinolin-3-ones is reported. Protonation and alkylation processes of these lactam enolates derived from phenylglycinol occur with opposite diastereofacial selectivity. This diastereoselective protonation has been applied to the asymmetric synthesis of (4S)-N-methyl-4-phenyl-1,2,3,4-tetrahydroisoquinoline
报道了4-取代的1,4-二氢异喹啉-3-酮的手性内酰胺醇酸酯的非对映选择性质子化。这些衍生自苯基甘醇的内酰胺烯醇化物的质子化和烷基化过程以相反的非对映选择性发生。该非对映选择性质子化已用于不对称合成以高达97%ee获得的(4S)-N-甲基-4-苯基-1,2,3,4-四氢异喹啉9。