Regioselective intramolecular aldol condensations of type I dialdehydes were explored under various reaction conditions, including those of the Woodward and the Corey methods. The results obtained by the use of excess morpholine-camphoric acid are given in Table I in comparison with those obtained by the previous methods. The structure assignments of products by nuclear magnetic resonance analysis are also described.
在各种反应条件下,包括伍德沃德法和科里法,对I型二醛的分子内选择性醛缩合反应进行了探索。表I中给出了使用过量吗啉-
樟脑酸所得到的结果,并与之前的方法所得到的结果进行了比较。还描述了通过核磁共振分析对产品进行结构分配的情况。