Synthesis of 4-(2-hydroxyphenyl)-1-phenyl-1,2,4-triazolidine-3,5-dione derivatives through cyclic transformations of 3-(2-phenylcarbazoyl)-2(3<i>H</i>)-benzoxazolone derivatives
作者:François Chau、René Milcent
DOI:10.1002/jhet.5570370633
日期:2000.11
)-benzoxazolone derivatives 3 have been synthesized from benzoxazolone derivatives 1 and benzaldehyde N-chloroformylphenylhydrazone 2. By acid hydrolysis, these compounds yielded 3-(2-phenylcarbazoyl)-2(3H)benzoxazolone derivatives 4 which were not isolated and were transformed via an intramolecular reaction into 4-(2-hydroxyphenyl)-1-phenyl-1,2,4-triazolidine-3,5-dione derivatives 5 in a good yield
由苯并恶唑酮衍生物1和苯甲醛N-氯甲酰基苯基hydr2合成了四个3-(3-亚苄基-2-苯基咔唑基)-2(3 H)-苯并恶唑啉酮衍生物3。通过酸水解,这些化合物产生了3-(2-苯基咔唑基)。未分离的-2(3 H)苯并恶唑酮衍生物4通过分子内反应转化为4-(2-羟苯基)-1-苯基-1,2,4-三唑烷-3,5-二酮衍生物5。良品率高。通过用各种脱水剂分子内消除水为三环化合物6来环化这些化合物的尝试是不成功的。