A NEW PHOTOCHEMICAL-SYNTHESIS OF DIHYDROPYRAZOLES - NOVEL MODE OF PHOTOCYCLIZATION OF SOME 1-IMINOBUT-3-ENES DERIVATIVES

被引：5

作者：

ARMESTO, D ^{[1
]}

HORSPOOL, WM ^{[1
]}

MANCHENO, MJ ^{[1
]}

ORTIZ, MJ ^{[1
]}

机构：

[1] UNIV DUNDEE,DEPT CHEM,DUNDEE DD1 4HN,SCOTLAND

来源：

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS | 1993年 / 09期

关键词：

D O I：

10.1039/c39930000721

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

While some hydrazine derivatives 3 of 2,2-dimethyl-4,4-diphenylbut-3-enal undergo both the aza-di-pi-methane (ADPM) rearrangement and a novel cyclization to afford dihydropyrazole derivatives 5 in varying yields, the tosylhydrazone derivative of 3,3-dimethyl-5,5-diphenylpent-4-en-2-one 7 gives exclusively an excellent yield of the corresponding dihydropyrazole 8, in a reaction that is proposed to involve an electron transfer process.

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页码：721 / 722

页数：2

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