Selective Synthesis of Cyano-Functionalized 2-Aryl-4H-chromenes and 2-Amino-4H-chromene-3-carbonitriles by Catalyst-Tuned Reactions of 2-Hydroxychalcones with 2-Substituted Acetonitriles

[摘要]：A selective synthesis of 4H-chromenes by the reactions of 2-hydroxychalcone derivatives with acetonitriles substituted with electron-withdrawing groups is described. Under catalyst-free conditions, the reactions give cyano-functionalized 2-aryl-4H-chromenes, whereas in the presence of sodium bicarbonate, 2-amino-4H-chromene-3-carbonitriles are obtained in excellent yields.

[全文传递流程]：

一般上传文献全文的时限在1个工作日内