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[摘要]：Controlling the pH value by changing the negative ion of ionic liquids, the same reactions of aromatic aldehyde, 2-(2,3-dihydrothiochromen-4-ylidene) malononitrile and malononitrile product unaromatized and aromatized 6H-benzo[c] thiochromene derivatives in high yields. The nice features of these procedures include mild reactions condition, simple operations, high yields, and environmentally benign. |
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