191337-78-7Relevant articles and documents
Convenient synthesis of 6-substituted-2-chloro-5,12-dihydro-5-oxobenzoxazolo[3,2-a]quinolines and N-acylated-3-chlorodibenz[b,e][1,4]oxazepin-11(5H)-ones
Chung, Sang J.,Joo, Keum Chan,Kim, Dong H.
, p. 485 - 488 (2007/10/03)
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-chloro-N-(2-hydroxyphenyl)anthranilic acids with acetic anhydride.