ACETYLATION AND DEBROMINATION OF SYDNONES ACCELERATED BY ULTRASOUND

被引：15

作者：

TIEN, HJ ^{[1
]}

YEH, JC ^{[1
]}

WU, SC ^{[1
]}

机构：

[1] CHINESE MIL ACAD,DEPT PHYS & CHEM,FENGSHAN 830,TAIWAN

来源：

JOURNAL OF THE CHINESE CHEMICAL SOCIETY | 1992年 / 39卷 / 05期

关键词：

4-ACETYLSYDNONES; 4-BROMOSYDNONES; ULTRASONIC REACTION; DEBROMINATION; ACETYLATION;

D O I：

10.1002/jccs.199200075

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In the presence of a catalytic amount of 60% perchloric acid, 4-acetyl-3-substituted sydnones were obtained more conveniently with greater yields by the sonochemical reaction of 3-substituted sydnone with acetic anhydride. Some 4-acetylsydnones which are difficult to synthesize by a known process were obtained in 17-68% yields. 4-Bromo-3-(bromoaryl)sydnones with activated zinc powder dispersed in methanol were debrominated regioselectively by ultrasound in high yields (60-96%). 3-(2'-/4'-Amino-3',5'-dibromophenyl)sydnone is synthesized easily from 3-(2'/4'-aminophenyl)sydnone by reduction, bromination and debromination subsequently.

引用

页码：443 / 447

页数：5

共 19 条

[1] ORGANIC SONOCHEMISTRY - SONIC ACCELERATION OF THE REFORMATSKY REACTION [J].