2-BENZOPYRAN-3-ONES STABILIZED BY ALKOXY SUBSTITUENTS

被引：8

作者：

BRADSHAW, DP ^{[1
]}

JONES, DW ^{[1
]}

TIDESWELL, J ^{[1
]}

机构：

[1] UNIV LEEDS,SCH CHEM,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND

来源：

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1 | 1991年 / 01期

关键词：

D O I：

10.1039/p19910000169

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

In contrast to the corresponding compounds lacking alkoxy substituents, the 2-benzopyran-3-ones 5, 6, 7 and 9 are stable and easily isolated. In contrast to the 6-methoxy derivative 7, the 7-methoxy isomer 8 cannot be isolated; the stablising effect of the 6,7-methylenedioxy group in 5 and 9 is therefore due to the alkoxy group at C-6. This is consistent with a donor-acceptor interaction involving the C-6 alkoxy group and the pyrone carbonyl which decreases reactivity towards nucleophilic attack by water.

引用

页码：169 / 173

页数：5

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