4,4′-Disubstituted 1,2,3,4-tetrahydroisoquinolines from alkylation of a chiral non racemic lactam. An approach to the crinine-type alkaloids
作者:Fanny Roussi、Jean-Charles Quirion、Alain Tomas、Henri-Philippe Husson
DOI:10.1016/s0040-4020(98)00491-8
日期:1998.8
Enantiomerically pure 4,4-disubstituted tetrahydroisoquinolin-3-ones can be easily prepared by bis-alkylation of 1,2,3,4-tetrahyroisoquinolin-3-one 1 derived from (R)-(−)-phenylglycinol. The observed diastereoselectivity was explained by a rigid chelated intermediate. The obtained bis-alkylated products were used to prepare the ABC and ABD rings of the crinine alkaloid skeleton.
对映体纯的4,4-二取代的四氢异喹啉-3-酮可以通过对衍生自(R)-(-)-苯基甘氨醇的1,2,3,4-四氢异喹啉-3-酮1进行双烷基化而容易地制备。观察到的非对映选择性是由刚性螯合的中间体解释的。将获得的双烷基化产物用于制备可丽碱生物碱骨架的ABC和ABD环。