A base-promoted formal [4 + 1+1] annulation of aldehyde, N-benzyl amidine and DMSO was developed, leading to a series of 2,4,6-triaryl pyrimidines in moderate to good yields. Notably, DMSO served as a methine source, which was activated by base rather than either Lewis acid or electrophile. Molecular O₂ was the sole eco-friendly oxidant during this procedure.

中文翻译：

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碱促进的醛，N-苄基am和DMSO对[2,4,6-三芳基]嘧啶的正[4 + 1 + 1]环化反应

开发了碱促进的醛，N-苄基am和DMSO的正式[4 + 1 + 1]环状，导致一系列2,4,6-三芳基嘧啶的中度到良好收率。明显地，DMSO用作次甲基源，其被碱而不是路易斯酸或亲电试剂活化。在此过程中，分子O ₂是唯一的环保氧化剂。