Reactions of 2-aminothiobenzamide with isocyanates: A new synthesis of 2, 3-dihydroimidazo[1, 2-<i>c</i>]quinazolin-5(6<i>H</i>)-one and 3, 4-Dihydro-2<i>H</i>-pyrimido[1, 2-<i>c</i>]quinazolin-6(7<i>H</i>)-one
作者:Chia-Yang Shiau、Ji-Wang Chern、Jung-Hsiung Tien、Kang-Chien Liu
DOI:10.1002/jhet.5570260314
日期:1989.5
2-chloroethyl and 3-chloropropyl isocyanates respectively. Subsequent treatment of compound 5a and 5b either with alkali or mineral acid led to the formation of 2, 3-dihydro-imidazo[1, 2-c]quinazolin-5(6H)-one 7a and 3, 4-Dihydro-2H-pyrimido[1, 2-c]quinazolin-6(7H)-one 7b.
通过分别用2-氯乙基和3-氯丙基异氰酸酯处理2-氨基硫代苯甲酰胺以高收率制备2-(2-氯乙基脲基)-和2-(3-氯丙基脲基)硫代苯甲酰胺5a,b。随后用碱或无机酸处理化合物5a和5b导致形成2,3-二氢-咪唑并[1,2 - c ]喹唑啉-5(6 H)-one 7a和3,4-Dihydro-2 H-嘧啶基[1,2 - c ]喹唑啉-6(7 H)-one 7b。