3-benzylidene-4,7-dichloro-3H-isobenzofuran-1-one 、 甲基肼 在
silica gel 作用下,
反应 0.01h,
以38%的产率得到4-benzyl-5,8-dichloro-2-methyl-2H-phthalazin-1-one
参考文献:
名称:
Pyrazolo[3,4,5-de]phthalazine. Syntheses of a practically unknown heterocyclic system
摘要:
Simple procedures for the synthesis of 1,3-dihydropyrazolo[3,4,5-de]phthalazines (2), a practically novel type of heterocyclic compounds, have been developed. Compounds equally substituted at positions N-1 and N-3 can be directly obtained from 4,7-dihalogenated benzalphthalides (1). Those with different R-2 and R-3 substituents are prepared through intermediate phthalazin-1-ones (3), whose synthesis is also considered. (C) 2008 Elsevier Ltd. All rights reserved.