New domino-reaction for the synthesis of<i>N</i><sup>4</sup>-(5-aryl-1,3-oxathiol-2-yliden)-2-phenylquinazolin-4-amines and 4-[4-aryl-5-(2-phenylquinazolin-4-yl)-1,3-thiazol-2-yl]morpholine
作者:Walid Fathalla、Pavel Pazdera、Jaromír Marek
DOI:10.1002/jhet.5570390605
日期:2002.11
The model morpholine-1-carbothioic acid (2-phenyl-3H-quinazolin-4-ylidene) amide (1) reacts with phenacyl bromides to afford N4-(5-aryl-1,3-oxathiol-2-yliden)-2-phenylquinazolin-4-amines (4) or N4-(4,5-diphenyl-1,3-oxathiol-2-yliden)-2-phenyl-4-aminoquinazoline (5) by a thermodynamically controlled reversible reaction favoring the enolate intermediate, while the 4-[4-aryl-5-(2-phenylquinazolin-4-yl)-1
模型吗啉-1-碳硫酸(2-苯基-3 H-喹唑啉-4-亚烷基)酰胺(1)与苯甲酰溴反应生成N 4-(5-芳基-1,3-氧杂硫醇-2-吡啶)通过热力学控制的可逆反应有利于-2-苯基喹唑啉-4-胺(4)或N 4-(4,5-二苯基-1,3-氧硫醇-2-基)-2-苯基-4-氨基喹唑啉(5)烯醇中间体,而4- [4-芳基-5-(2-苯基喹唑啉-4-基)-1,3-噻唑-2-基]吗啉(8)是通过动力学控制反应生成的,有利于C-阴离子中间体。1 H nmr,13 C nmr,ir,质谱和X射线鉴定的化合物(4),(5)和(8)。