Photochemistry of furans. Photochemical transformations of some substituted 2-phenyl-3-furylacrylic acids
作者:G. Karminski-Zamola、L. Fišer-Jakič、K. Jakopčić
DOI:10.1016/0040-4020(82)85121-1
日期:1982.1
UV-irradiated under aerobic conditions to give several types of photoproducts, ie substituted naphtho[2,1-b]furancarboxylic acids (B), 2,3-epoxy-2,3-dihydrofuro[3,2-b]pyran-5-ones (C), 7a - hydroxy - 3a,7a - dihydrofuro[3,2 - b]pyran - 5 - ones (D) and 7a - hydroperoxy - 3a,7a - dihydrofuro[3,2 - b]pyran - 5 - one (E) were recognized. The type of product and yield are strongly substituent-dependent
通过改良的珀金反应合成了许多新的取代的2-苯基-3-呋喃基丙烯酸(1-14),分离为它们的E和Z异构体,并通过分光光度法进行了鉴定。在有氧条件下对电子异构体进行紫外线辐照,得到几种类型的光产物,即取代的萘并[2,1- b ]呋喃羧酸(B),2,3-环氧-2,3-二氢呋喃[3,2- b] ] pyran-5-ones(C),7a-羟基-3a,7a-二氢呋喃[3,2- b ] pyran-5-一个(D)和7a-氢过氧基-3a,7a-二氢呋喃[3,2- b ] pyran-5-1(E)被认可。产物的类型和产率高度依赖于取代基。