Convenient synthesis of 6-substituted-2-chloro-5,12-dihydro-5-oxobenzoxazolo[3,2-<i>a</i>]quinolines and<i>N</i>-acylated-3-chlorodibenz[<i>b,e</i>][1,4]oxazepin-11(5<i>H</i>)-ones
作者:Sang J. Chung、Keum Chan Joo、Dong H. Kim
DOI:10.1002/jhet.5570340221
日期:1997.3
Convenient synthesis of variously substituted 2-chloro-5,12-dihydro-5-oxobenzoxazolo[3,2-a]quinolines at the 6-position and N-acylated-3-chlorodibenz[b,e][1,4]oxazepin-11(5H)-ones are reported. The former compounds were obtained in 65–93% yield by simply heating N-acyl-4-chloro-N-(2-hydroxyphenyl)-anthranilic acids in acetic anhydride for 4 hours, and the latter by heating sodium salt of N-acyl-4-
方便合成6-位不同取代的2-氯-5,12-二氢-5-氧代苯并恶唑并[3,2- a ]喹啉和N-酰化-3-氯二苯并[ b,e ] [1,4]恶唑啉报告了-11(5 H)-1。前者通过简单地在乙酸酐中加热N-酰基-4-氯-N-(2-羟基苯基)-邻氨基苯甲酸4小时,以65-93%的收率获得,后者通过加热N-酰基的钠盐获得。-4-氯-N-(2-羟苯基)邻氨基苯甲酸与乙酸酐。