An efficient method for the enantio‐ and diastereoselective formation of furanochromanones has been developed via Pd‐catalyzed asymmetric allylic cycloaddition of vinylethylene carbonates with 3‐nitrochromone. By using a palladium complex generated in situ from [Pd₂(dba)₃]⋅CHCl₃ and phosphoramidite L4 as a catalyst, the transformation allows to rapid access furanochromanones bearing versatile nitro‐group and multi‐stereocenters in high yields with excellent enantioselectivities and moderate diastereoselectivities.

中文翻译：

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碳酸乙烯酯与3-硝基色酮的钯催化烯丙基环加成反应

通过钯催化碳酸亚乙烯酯与3-硝基色酮的不对称烯丙基环加成反应，开发了一种有效的对呋喃并二氢呋喃酮对映体和非对映体选择性形成方法。通过使用由[Pd ₂（dba）₃ ]·CHCl ₃和亚磷酰胺L4原位生成的钯配合物作为催化剂，该转化可以快速获得具有通用硝基基团和多立体中心的呋喃并二氢呋喃，并具有出色的对映选择性和中度非对映选择性。