Coconut endocarp shell ash (CESA): a non-conventional catalyst for green synthesis of 2-amino-4H-benzochromenes
作者:Sandip P. Patil、Sachinkumar K. Shinde、Suresh S. Patil
DOI:10.1007/s11164-022-04847-x
日期:2022.12
In the present research, the coconut endocarp shell as a natural waste was converted into a valuable non-conventional catalyst by a simple thermal treatment, namely coconut endocarp shell ash (CESA). The prepared CESA was characterized using several analytical techniques, including TGA, FT-IR, XRD, BET, SEM, and EDX. The catalytic property of the CESA was examined in the synthesis of pharmaceutically active 2-amino-4H-benzochromene derivatives via one-pot three-component condensation of aldehydes, malononitrile, and α or β-naphthol in ethanol at room temperature. The most promising aspects of the presented approach are the high catalytic efficiency, short reaction time, excellent yield of products, operational simplicity, waste to wealth, and optimization with the design of experiment. Moreover, the CESA catalyst was recycled five times without any apparent loss of its catalytic activity.
在目前的研究中,通过简单的热处理,将天然废弃物椰子内果壳转化为一种宝贵的非传统催化剂,即椰子内果壳灰(CESA)。使用多种分析技术对制备的CESA进行表征,包括TGA、FT-IR、XRD、BET、SEM和EDX。通过在乙醇中室温下对醛、丙二腈和α或β-萘酚进行一锅三组分缩合,在药物活性2-氨基-4H-苯并吡喃衍生物的合成中考察CESA的催化性能。所提出方法最有前景的方面