The reaction of 1,1-dichloro-2-vinylcyclopropane with arenes under the action of the superacid TfOH afforded 3-aryl-1,1-dichloropent-1-enes (25–43% yield), as the products of cyclopropane ring opening. The reaction of 1,1-dichloro-2-methyl-2-vinylcyclopropane was realized as a two-step procedure, including initial in situ generation of the corresponding triflate, 5,5-dichloro-4-methylpent-4-en-2-yl trifluoromethanesulfonate, from the cyclopropane and TfOH, followed by reaction with arenes and TfOH to give 1,1-dichloro-2-methyl-4-arylpent-1-enes (30–68% yield).

中文翻译：

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TfOH促进乙烯基宝石-二氯环丙烷与芳烃的反应：获得芳基宝石-二氯戊烯

1,1-二氯-2-乙烯基环丙烷在超强酸TfOH作用下与芳烃反应，生成3-芳基-1,1-二氯戊-1-烯（收率25-43％），为环丙烷开环产物。1,1-二氯-2-甲基-2-乙烯基环丙烷的反应分两个步骤进行，包括初始原位生成相应的三氟甲磺酸盐，5,5-二氯-4-甲基戊-4-烯-2环丙烷和TfOH中的三氟甲磺酸正丁基酯，然后与芳烃和TfOH反应，得到1,1-二氯-2-甲基-4-芳基戊-1-烯（30-68％收率）。