Dimethyl 2-(o-acylbenzoyl)-1,2-dihydroisoquinoline-1-phosphonates (3) were prepared from isoquinoline, o-acylbenzoyl chloride, and trimethyl phosphite. Intramolecular Wittig-Horner reaction of 3 with LDA afforded good yields of 13-substituted 8H-dibenzo [a, g]quinolizin-8-ones (4) which bear an isoquinoline alkaloid skeleton.
2-(o-酰基苯甲酰基)-1,2-二氢
异喹啉-1-
膦酸二甲酯 (3) 由
异喹啉、邻酰基
苯甲酰氯和亚
磷酸三甲酯制备。3 与
LDA 的分子内 Wittig-Horner 反应提供了具有
异喹啉生物碱骨架的 13-取代的 8H-二苯并 [a, g] quinolizin-8-ones (4) 的良好产率。