BENZOPYRANS .28. REACTION OF 4-OXO-4H-1-BENZOPYRAN-3-CARBOXALDEHYDES WITH PHENYLDIAZOMETHANE

被引：0

作者：

GHOSH, CK

SAHANA, S

机构：

来源：

INDIAN JOURNAL OF CHEMISTRY SECTION B-ORGANIC CHEMISTRY INCLUDING MEDICINAL CHEMISTRY | 1992年 / 31卷 / 06期

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中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The reaction of 4-oxo-4H-1-benzopyran-3-carboxaldehyde (1a) and its 6-chloro derivative (1c) with phenyldiazomethane gives the xanthones 14a and 14c, respectively. However, the reaction of 6-methyl-4-oxo-4H-1-benzopyran-3-carboxaldehyde (1b) with phenyldiazomethane under identical conditions furnishes the cyclopropabenzopyran (17) instead of the expected xanthone (14b). Suitable mechanisms have been proposed to explain the formation of these products.

引用

页码：346 / 348

页数：3

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