A simple dihydroquinine organocatalyst can catalyze the enolate‐mediated [3+3] annulation of various 4‐alkyl‐thiane‐3,5‐diones with alkyl vinyl ketones to furnish functionally rich chiral 2‐thiabicyclo[3.3.1]nonanes in very good yields with excellent enantio‐ and diastereoselectivities.

中文翻译：

---

有机催化不对称形式[3 + 3]环加成反应制备2-硫代环[3.3.1]壬烷

一个简单的二氢奎宁有机催化剂可以催化烯醇盐介导的[3 + 3]各种4-烷基噻吩-3,5-二酮与烷基乙烯基酮的反应，从而以非常好的方式提供功能丰富的手性2-噻吩双环[3.3.1]壬烷产生优异的对映异构和非对映异构选择性。