SOME REACTIONS OF 6-CHLORO-2-METHYL 4H-1-BENZOPYRAN-4-ONE .2.

被引：0

作者：

SALEM, MAI ^{[1
]}

AHMED, AA ^{[1
]}

ELSHEKEIL, AG ^{[1
]}

BABAOUI, AS ^{[1
]}

MADKOUR, HMF ^{[1
]}

机构：

[1] SANAA UNIV,FAC SCI,DEPT CHEM,SANAA,YEMEN

来源：

JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN | 1992年 / 14卷 / 01期

关键词：

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

6-Chloro-2-methyl-4-H-1-benzopyran-4-one (1) gave the isoxazole derivative (2a) on reaction with hydroxylamine hydrochloride. The action of hydrazine and phenylhydrazine on (1) resulted in pyrazole derivatives (3a) and (3b) respectively. The reactivity of (1) with ethyloxalate and aromatic nitroso compounds have been investigated. Phthalide (8a) derived from the chromone (1) was synthesised and rearranged easily into 1,3-indandione (9) upon refluxing with alcoholic sodium methoxide. Cleavage of (8) with amines and hydrazine hydrate was studied. Thiation of phthalide (8a) with either Lawesson's re-agent or phosphorous pentasulphide yielded the corresponding thione (8c)

引用

页码：24 / 34

页数：11