Syntheses of 4-Substituted 2-(Trichloromethyl)quinazolines under Mild Conditions by Benzyne [4+2] Cycloaddition
作者:Harim Lechuga-Eduardo、Horacio F. Olivo、Moises Romero-Ortega
DOI:10.1002/ejoc.201402706
日期:2014.9
An experimentally simple and convenient synthesis of 4-susbstituted 2-(trichloromethyl)quinazolines by cycloaddition of benzyne with 2-(trichloromethyl)-1,3-diazabutadienes was developed. The 2-(trichloromethyl)-1,3-diazabutadienes (R1 = H and Me) were prepared from trichloroacetamidine and the appropriate N,N-dimethylamide dimethyl acetal or from trichloroacetamidine and a Vilsmeier–Haack reagent
开发了通过苄与 2-(三氯甲基)-1,3-二氮杂丁二烯的环加成在实验上简单方便地合成 4-取代的 2-(三氯甲基) 喹唑啉。2-(三氯甲基)-1,3-二氮杂丁二烯(R1 = H 和 Me)由三氯乙脒和适当的 N,N-二甲基酰胺二甲基乙缩醛或三氯乙脒和含有芳基的 Vilsmeier-Haack 试剂制备。