作者:Kevin T. Potts、Maurice O. Dery
DOI:10.1039/c39860000563
日期:——
hydroxide and the corresponding ethynyl derivative underwent ready thermal 1,4-dipolar cycloaddition to give a 1 : 1-cycloadduct (whose structure was determined by X-ray crystallography) in a highly regio- and stereo-selective cycloaddition and 1,3-diphenyl-2H-benzo[h]pyrano[4,3-b]pyrid-2(1H)-one, respectively; no cycloaddition was observed, however, on increasing the alkenyl chain by one carbon atom
脱水-2-(2-烯丙氧基苯基)-3,5-二苯基-4-羟基-6-氧代-1,3-氢氧化噻嗪鎓和相应的乙炔基衍生物进行热的1,4-偶极环加成反应以形成1:1 -环加合物(其结构由X射线晶体学测定)在高度区域和立体选择性环加成反应中和1,3-二苯基-2 H-苯并[ h ]吡喃并[4,3 - b ]吡喃-2(1)H)-一;然而,在链烯基链增加一个碳原子时未观察到环加成,噻嗪鎓核重排至取代的喹诺尔-4-酮是优选的反应途径。