Cycloaddition of anhydro-3-hydroxy-2-phenylthiazolo[3,2-c]quinazolin-4-ium hydroxide with olefinic dipolarophiles
作者:Kevin T. Potts、Kirk Bordeaux、William Kuehnling、Ronald Salsbury
DOI:10.1039/c39840000213
日期:——
2-C]quinazolin-4-ium hydroxide (1) underwen; cycloaddition with ethyl acrylate and dimethyl tumarate to give pyrroloquinazoline derivatives [(3) and (7)] and COS, whereas with acetylenic dipolarophiles the anticipated ring-fused pyridinones e.g.(8) were obtained with extrusion of sulphur from the initial 1 : 1-cycloadduct; these represent the first rearrangements observed with olefinic dipolarophiles and mesoionic
脱水-3-羟基-2-苯基噻唑并[3,2 - C ]喹唑啉-4-氢氧化物(1);用丙烯酸乙酯和硬脂酸二甲酯进行环加成反应,得到吡咯并喹唑啉衍生物[(3)和(7)]和COS,而使用炔属双极性亲和剂时,预期的环稠合吡啶并酮例如(8)是从最初的1:1挤出硫得到的环加合物; 这些代表用这种类型的烯烃双极性亲和剂和中离子系统观察到的第一个重排。