Mechanochemical Synthesis of Substituted 4H-3,1-Benzoxazin-4-ones, 2-Aminobenzoxazin-4-ones, and 2-Amino-4H-3,1-benzothiazin-4-ones Mediated by 2,4,6-Trichloro-1,3,5-triazine and Triphenylphosphine
作者:Mookda Pattarawarapan、Sirawit Wet-osot、Dolnapa Yamano、Wong Phakhodee
DOI:10.1055/s-0036-1588125
日期:——
A mild and convenient approach for the synthesis of 2-substituted 4H-3,1-benzoxazin-4-ones, 2-aminobenzoxazin-4-ones, and 2-amino-4H-3,1-benzothiazin-4-ones under solvent-assisted grinding is reported. In the presence of 2,4,6-trichloro-1,3,5-triazine and catalytic triphenylphosphine, cyclodehydration of N-substituted anthranilic acid derivatives proceeded rapidly within minutes at room temperature
在溶剂下合成 2-取代 4H-3,1-benzoxazin-4-ones、2-aminobenzoxazin-4-ones 和 2-amino-4H-3,1-benzothiazin-4-ones 的温和而方便的方法-辅助研磨被报道。在 2,4,6-三氯-1,3,5-三嗪和催化三苯基膦的存在下,N-取代邻氨基苯甲酸衍生物的环脱水在室温下在几分钟内迅速进行。通过使用最少量的溶剂和廉价的试剂,产品也以良好到极好的收率获得。