A novel and efficient metal-free synthesis of phenolic compounds was developed via coupling cyclization of DMF as a carbon source with active methylene compounds such as 1,3-dicarbonyl compounds with the assistance of 1,1-dichloro-2-nitroethene. The method we used was different from other traditional phenol functionalization methods. In the reaction, the 1,1-dichloro-2-nitroethene as a promoter which unlike our previous research on 1,1-dichloro-2-nitroethene. The method allows the convenient construction of phenolic compounds under mild reaction conditions and moderate yields.

中文翻译：

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通过1,1-二氯-2-硝基乙烯合成取代酚促进了羰基化合物与DMF的缩合

通过将作为碳源的DMF与活性亚甲基化合物（例如1,3-二羰基化合物）在1,1-二氯-2-硝基乙烯的辅助下偶联环化，开发了一种新颖，有效的无金属酚类化合物合成方法。我们使用的方法不同于其他传统的苯酚官能化方法。在反应中，1,1-二氯-2-硝基乙烯作为促进剂，这与我们先前对1,1-二氯-2-硝基乙烯的研究不同。该方法允许在温和的反应条件下以中等收率方便地构建酚类化合物。