Bis-(amino)cyclopropenylidene has been utilised as a non-covalent Brønsted base catalyst in the 1,6-conjugate addition of carbon nucleophiles to p-QMs. This protocol makes it possible to access unsymmetrical diaryl- and triarylmethanes in good to excellent yields. Further, this catalyst was also explored in the 1,4-conjugate addition of carbon nucleophiles to enone systems.

中文翻译：

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在共轭加成反应中探索作为非共价布朗斯台德碱催化剂的双（氨基）环丙烯基†

在碳亲核体向p -QMs的1,6-共轭加成中，双-（氨基）环丙烯基已被用作非共价布朗斯台德碱催化剂。该协议使得可以以良好的产率获得不对称的二芳基甲烷和三芳基甲烷。此外，还在将碳亲核试剂的1，4-共轭加成至烯酮体系中探索了该催化剂。