Synthesis of 3-aminoalkyl-2-arylaminoquiazolin-4(3<i>H</i>)-ones and 3,3′-disubstituted bis-2-arylaminoquinazolin-4(3<i>H</i>)-ones<i>via</i>reactions of 1-aryl-3-(2-ethoxycarbonylphenyl)carbodiimides with diamines
作者:Xu-Hong Yang、Ming-Hu Wu、Shao-Fa Sun、Jia-Li Xie、Ming-Wu Ding、Qing-Hua Xia
DOI:10.1002/jhet.5570450518
日期:2008.9
1-Aryl-3-(2-ethoxycarbonylphenyl)carbodiimides 2, obtained from aza-Wittig reactions of iminophosphorane 1 with aryl isocyanates, reacted with primary diamines in 1:1 and 2:1 molar ratio under mild conditions to give selectively the regioisomers 3-aminoalkyl-2-arylaminoquinazolin-4(3H)-ones 3 and 3,3′-disubstituted bis-2-arylaminoquinazolin-4(3H)-ones 4 in good yields, respectively. To fully characterize
由亚氨基膦烷1与异氰酸芳基酯的氮杂-维蒂希反应制得的1-芳基-3-(2-乙氧基羰基苯基)碳二亚胺2在温和的条件下与伯二胺以1:1和2:1的摩尔比反应选择性地产生区域异构体3 -氨基烷基-2-芳基氨基喹唑啉-4(3 H)-ones 3和3,3'-二取代的双-2-芳基氨基喹唑啉-4(3 H)-ones 4分别具有良好的收率。为充分表征1-芳基-3-(2-乙氧基羰基苯基)碳二亚胺与伯二胺的氮杂-维蒂希反应的区域选择性,获得了4e晶体,并通过X射线晶体学确定了其结构。