Reactions of ethoxycarbonylmethylene(triphenyl)phosphorane with some ortho-quinones in the presence of triphenylphosphine, alcohols and acetic anhydride
作者:Demetrios N. Nicolaides、Spyros G. Adamopoulos、Demetrios A. Lefkaditis、Konstantinos E. Litinas、Petroula V. Tarantili
DOI:10.1039/p19920000283
日期:——
The reactions of ortho-quinones 1a, 1c and 1d with ylide 2 in the presence of triphenylphosphine afforded the ylides 11a, 11c and 11d and compound 12. The reactions of 1a and 1c with 2 in refluxing methanol or ethanol gave compounds 16 and 17 respectively, while the reactions of 1a–d with 2 in acetic anhydride yielded the acetates 18a, 18b, 18d and 19b, 19d, the furan derivative 24 and the ylide 25
在三苯基膦存在下,邻醌1a,1c和1d与内鎓盐2的反应得到了酰基化物11a,11c和11d以及化合物12。的反应1A和1C与2在回流的甲醇或乙醇,得到化合物16和17分别同时的反应1A - ð与2在乙酸酐,得到乙酸盐18A,18B,图18d和19b,19d是呋喃衍生物24和叶立德25。在上述大多数反应中也获得了化合物8和9。酰化物11a,11c与对硝基苯甲醛的维蒂希反应和酰化物2与香豆素8a和29的维蒂希反应分别产生化合物14a,14c,26和30。化合物的变换18,19成8,还研究了9以及化合物26到28的化合物。