A new approach for the synthesis of 9-membered N,N,O-heterocycles by Pd-catalyzed [6+3] dipolar cycloaddition of N-iminoisoquinolinium ylides and 2-vinyl oxetanes has been developed. The scope of this cycloaddition was demonstrated with 28 examples. This is another important synthetic strategy for medium-sized rings by employing N-iminoisoquinolinium ylides as ternary synthons.
开发了一种通过 Pd 催化的N-亚
氨基
异喹啉鎓叶立德和 2-
乙烯基氧杂
环丁烷的 [6+3] 偶极环加成合成 9 元 N,N,O-杂环的新方法。用 28 个例子证明了这种环加成的范围。这是利用N-亚
氨基
异喹啉鎓叶立德作为三元合成子的另一个重要的中环合成策略。