Ring expansion and ring contraction observed in isopropenyldihydrofuran derivatives

被引：2

作者：

Yamaguchi, S ^{[1
]}

Sugioka, Y ^{[1
]}

Kitagawa, Y ^{[1
]}

Matsumoto, Y ^{[1
]}

Yokoyama, H ^{[1
]}

Hirai, Y ^{[1
]}

机构：

[1] Toyama Univ, Fac Sci, Dept Chem, Toyama 930, Japan

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1997年 / 70卷 / 11期

关键词：

D O I：

10.1246/bcsj.70.2777

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An intramolecular anhydride formation in 5-isopropenyl-4,5-dihydrofuran-2,3-dicarboxylic acid caused a new ring expansion to give 4,7-dihydro-6-methyloxepin-2,3-dicarboxylic anhydride (2b). An aminolysis of 2b with benzylamine gave a mixture of two isomeric carboxamides, N-benzyl-4,7-dihydro-6-methyloxepin-2-carboxamide and trans-1(benzyloxamoyl)-2-isopropenylcyclopropane. Also, the ring expansion and ring contraction are discussed.

引用

页码：2777 / 2780

页数：4

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