Abstract Saccharinyl benzoic acid azides 2a-c were used to synthesize a number of noncondensed heterocyclic systems. Thus azides 2a or 2c reacted with glycine to give 1,3-oxazolin-5-one derivatives 3a and 3b. However azide 2b reacted to give diaryl urea derivative which was easily cyclized to give imidazol -2,5- dione (6). Also azides 2a-c reacted with glycolic acid to give 1,3-oxazolin -2,5-dione
摘要
糖精基
苯甲酸叠氮化物 2a-c 用于合成许多非稠合杂环系统。因此
叠氮化物2a或2c与甘
氨酸反
应得到1,3-
恶唑啉-5-
酮衍
生物3a和3b。然而,
叠氮化物 2b 反应生成二芳基
脲衍
生物,其易于环化生成
咪唑 -2,5-二
酮 (6)。此外,
叠氮化物 2a-c 与
乙醇酸反应生成 1,3-
恶唑啉 -2,5-二
酮衍
生物 (7a-c),并与芳酰
肼反应生成相应的酰
肼 (8a-f),然后将其环化为 1,3, 5-恶二唑衍
生物 (9a-f)。