and a Lewis acid, underwent selective single or double annulation, depending on the Lewis acid promoter. Treatment with TiCl4 gave cyclohexenyl alcohols III, whereas BF3·OEt2 gave oxadecalins IV. The scope and limitations of the two annulation reactions are described.
由
炔烃I与四正丁基
碘化铵和
路易斯酸生成的β-异
戊烯酸酯II进行选择性单环或双环化反应,具体取决于
路易斯酸促进剂。用TiCl 4处理得到
环己烯基醇III,而BF 3 ·OEt 2处理得到奥沙德卡林IV。描述了两个环化反应的范围和局限性。