Benzopyrans .35. Reaction of 4-oxo-4H-1-benzopyran-3-carboxylic acid and its methyl ester with diazomethane

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作者：
Ghosh, CK
Sahana, S
Ghosh, C
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来源：
INDIAN JOURNAL OF CHEMISTRY SECTION B-ORGANIC CHEMISTRY INCLUDING MEDICINAL CHEMISTRY | 1996年 / 35卷 / 07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 title acid 2 on treatment with diazomethane gives furobenzopyran 5 cyclopropane 8 and the pyrazoles 11-13 whereas methyl 4-oxo-4H-1-bentopyran-3-carboxylate (1) gives its 2-methyl homologue and 8. Compound 8 on heating with methanol yields benzoxepin 9.
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页码：669 / 672
页数：4
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