Synthetic equivalents to substituted acetylenes in cycloaddition reactions. Dienophilic reactivity of 2-methyl-, 2-phenyl- and 2,3-trimethylene-1,4-benzodithiins-1,4-tetroxides
作者:Andrea Giacometti、Ottorino De Lucchi、Francisco Dilillo、Sergio Cossu、Karl Peters、Eva-Maria Peters、Hans G. von Schnering
DOI:10.1016/s0040-4020(01)85275-3
日期:1994.1
(3c) have been prepared with different methods starting from benzene-1,2-dithiol (1). Their reactivity was tested towards cyclopentadiene, sulfolene, furan and 1,3-cyclohexadiene. The Diels-Alder adducts to cyclopentadiene were converted into the corresponding unsaturated hydrocarbons, mimicking the Diels-Alder reaction of substituted acetylenes. The X-ray structure determinations of 4b, a secondary
亲双烯体2-甲基-1,4-苯并二硫辛-1,4-四氧化物(3a),2-苯基-1,4-苯并二硫辛-1,4-四氧化物(3b)和2,3-三亚甲基-1,4-苯并二硫辛从苯-1,2-二硫醇(1)开始,已经用不同的方法制备了-1,4-四氧化物(3c)。测试了它们对环戊二烯,环丁砜,呋喃和1,3-环己二烯的反应性。模仿环戊二烯的Diels-Alder加合物转化为相应的不饱和烃,模仿了取代乙炔的Diels-Alder反应。X射线结构测定4b(2-苯基-1,4-苯并二硫辛-1,4-四氧化物的制备中的副产物)以及苯基取代的衍生物与环戊二烯的加合物报道了8b。