A FACILE SYNTHESIS OF [1]BENZOPYRANO[4,3-B]PYRIDIN-5-ONES

被引：0

作者：

IVANOV, IC ^{[1
]}

KARAGIOSOV, SK ^{[1
]}

SIMEONOV, MF ^{[1
]}

机构：

[1] BULGARIAN ACAD SCI,CTR PHYTOCHEM,INST ORGAN CHEM,BU-1113 SOFIA,BULGARIA

来源：

LIEBIGS ANNALEN DER CHEMIE | 1992年 / 03期

关键词：

1]BENZOPYRANO[4,3-B]PYRIDINES; 4-AMINOCOUMARINS; KNOEVENAGEL REACTION; DIMROTH-LIKE REARRANGEMENT;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The title compounds 5a-c and 7a-m have been prepared by Vilsmeier formylation of 4-aminocoumarins 1 yielding aldehydes 2, and subsequent condensation of 2 with C-H acids in the presence of piperidine. This condensation probably proceeds via the intermediate ylidenemalonic esters 4. By means of detailed H-1- and C-13-NMR studies a Dimroth-type rearrangement of intermediates 6f-m has been found to take place in the course of the formation of products 7f-m.

引用

页码：203 / 207

页数：5

共 15 条

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KARAGIOSOV, SK
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