Aminium salts-induced dimerization of α-methylstyrene and 1-aryl-1-phenylethylenes. Solvent effect
作者:Francesco Ciminale、Liugi Lopez、Vincenza Paradiso、Angelo Nacci
DOI:10.1016/0040-4020(96)00838-1
日期:1996.10
The aminium salts-induced dimerization of α-methylstyrene 1b gives rise, depending on the solvent employed, to high yields of 1,3,3-trimethyl-1-phenylindane 2b, or 2,4-diphenyl-4-methyl-1-pentene 6b. Several 1-aryl-1-phenylethylenes 1a,c-e afford, instead, cyclodimers 2a,c-e, or 2,5-diaryl-2,5-diphenyltetrahydrofuran derivatives 3a,c-e.
铵盐诱导的α-甲基苯乙烯1b的二聚反应,取决于所使用的溶剂,导致1,3,3-三甲基-1-苯基茚满2b或2,4-二苯基-4-甲基-1-二甲基苯的高收率。戊烯6b。相反,几种1-芳基-1-苯基乙烯1a,ce提供了环二聚体2a,ce,或2,5-二芳基-2,5-二苯基四氢呋喃衍生物3a,ce。