Microwave-assisted efficient and convenient one-pot synthesis of novel 3-(4-aminothieno[2,3-d]pyrimidin-5-yl)coumarins under solvent-free conditions
作者:Devulapally Srikrishna、Pramod Kumar Dubey
DOI:10.1007/s10593-018-2340-9
日期:2018.7
An efficient green synthesis of novel 3-(4-aminothieno[2,3-d]pyrimidin-5-yl)coumarins has been developed. One-pot reaction of 3-acetylcoumarin, malononitrile, and elemental sulfur, catalyzed by L-proline, resulted in the formation of thiophene derivatives, which were used as precursors for the synthesis of 3-(4-aminothieno[2,3-d]pyrimidin-5-yl)coumarins. Target compounds were prepared by a one-pot
已开发出新型3-(4-氨基噻吩并[2,3 - d ]嘧啶-5-基)香豆素的有效绿色合成方法。L-脯氨酸催化的3-乙酰基香豆素,丙二腈和元素硫的一锅反应导致形成噻吩衍生物,这些衍生物用作合成3-(4-氨基噻吩并[2,3- d]的前体] pyrimidin-5-yl)香豆素。通过一锅法或逐步制备目标化合物,并将NH 4 OAc用作试剂和熔融盐。成功地应用了微波辐照法,以优异的产率提供了产品。