The use of isoquinolinetriones in the synthesis of benzo[c]phenanthridine alkaloids
作者:C. Pollers-Wieërs、J. Vekemans、S. Toppet、G. Hoornaert
DOI:10.1016/0040-4020(81)85028-4
日期:1981.1
Reaction of isoquinolinetriones 1 with phosphonates 2 yields E-ethyl α-benzylidene-1,2,3,4-tetrahydro-2-methyl-1,3-dioxo-4-isoquinolineacetates 3. Treatment of them with diazomethane leads to the corresponding E-ethyl α-benzylidene-1,2-dihydro-3-methoxy-2-methyl-1-oxo-4-isoquinolineacetates 4. Irradiation of the latter affords benzo[c]phenanthridones of type 5.
异喹啉三酮1与膦酸酯2的反应产生E-乙基α-亚苄基-1,2,3,4-四氢-2-甲基-1,3-二氧代-4-异喹啉乙酸酯3。用重氮甲烷对其进行处理得到相应的E-乙基α-亚苄基-1,2-二氢-3-甲氧基-2-甲基-1-氧代-4-异喹啉乙酸酯4。后者的辐照得到5型苯并[c]菲蒽酮。