Novel Quinazoline Ring Synthesis by Cycloaddition of N-Arylketenimines with N,N-Disubstituted Cyanamides.
作者:Masao Shimizu、Akihiro Oishi、Yoichi Taguchi、Yasuo Gama、Isao Shibuya
DOI:10.1248/cpb.50.426
日期:——
The reaction of N-aryl-substituted ketenimines with N,N-disubstituted cyanamides or (MeS)2C=N-CN under high pressure afforded 4-(N,N-disubstituted amino) or 4-(MeS)2C=N-substituted quinazoline derivatives, respectively. These products were formed by [4+2] cycloaddition between the aza-diene moieties of the N-arylsubstituted ketenimines and cyano groups. A 4-(unsubstituted amino)quinazoline derivative
N-芳基取代的酮亚胺与N,N-二取代的氰胺或(MeS)2C = N-CN在高压下反应,得到4-(N,N-二取代的氨基)或4-(MeS)2C = N-取代喹唑啉衍生物。这些产物是通过在N-芳基取代的酮亚胺的氮杂-二烯部分和氰基之间进行[4 + 2]环加成而形成的。通过水解后者的产物合成4-(未取代的氨基)喹唑啉衍生物。