A new type of δ-vinylvalerolactone for palladium-catalyzed cycloaddition: synthesis of nine-membered heterocycles
作者:Kuan Li、Sen Yang、Bing Zheng、Wei Wang、Yongjun Wu、Jing Li、Hongchao Guo
DOI:10.1039/d2cc01134d
日期:——
In this paper, a new type of δ-vinylvalerolactone was designed and synthesized, and used as a new precursor in Pd-catalyzed [6+3] cycloaddition with azomethine imines, leading to nine-membered 1,2-dinitrogen-containing heterocycles in 77–98% yields with >20 : 1 d.r. These nine-membered ring-fused products were further transformed into unusual tetracyclic bridged-ring compounds without loss of the
本文设计合成了一种新型的δ-乙烯基戊内酯,并作为新的前驱体用于Pd催化的[6+3]与偶氮甲亚胺的环加成反应,生成了9元1,2-含二氮杂环。 77–98% 产率,>20 : 1 dr 这些九元环稠合产物进一步转化为不寻常的四环桥环化合物,而不会损失非对映选择性。