Reactions of ω-phenylalkenes with sulfur trioxide; sulfonation and Friedel-Crafts type of cyclization
作者:Ruud M. Schonk、Bert H. Bakker、Hans Cerfontain
DOI:10.1002/recl.19921110903
日期:——
Reactions of ω-phenylalkenes 1a-31a with sulfur trioxide were studied in the temperature range −60 to 25°C using dichloromethane as solvent and 1.5 mol equiv. of dioxane as reactivity moderator. ω-Phenylalkenes 1a-7a react just like simple alkenes: at low temperature, they yield the (thermally unstable) β-sultones 1b-7b and 4c-7c, which at 25°C are converted into the corresponding carbyl sulfates.
使用二氯甲烷作为溶剂,当量为1.5 mol,在-60至25°C的温度范围内研究了ω-苯基烯烃1a-31a与三氧化硫的反应。二恶烷作为反应性调节剂。ω-苯基烯烃1a-7a就像简单的烯烃一样反应:在低温下,它们会产生(热不稳定)β-磺内酯1b-7b和4c-7c,它们在25°C时会转化为相应的羰基硫酸盐。在Ph与C = C部分之间具有-(CH 2)3-键的ω-苯基烯烃8a-10a的反应,当量为1.1。-60°C下的SO 3浓度非常快速且定量地生成1-(1-磺烷基)-1,2,3,4-四氢萘8F和9F(= 10F) 。在Ph和C = C之间具有-(CH 2)2-键的ω-苯基烯烃11a和12a与1.1摩尔当量的反应。在-60°C下SO 3的浓度分别导致1-甲基-1,2,3,4-四氢萘-2-磺酸的11h和12h的定量和立体定向形成。5-(氯苯基)-2-戊烯13a-16a清楚地表明,β-磺内酯13b-16