Proton-exchanged montmorillonite-mediated reactions of hetero-benzyl acetates: Application to the synthesis of Zafirlukast
作者:Lei Yang、Xuan Chen、Kaidong Ni、Yuansheng Li、Jianhong Wu、Weilin Chen、Yin Ji、Lili Feng、Fei Li、Dongyin Chen
DOI:10.1016/j.tetlet.2020.152123
日期:2020.7
the mesopores, and serve as an efficient heterogeneous catalyst for the synthesis of heterocycle-containing diarylmethanes via Friedel-Crafts-like alkylation of (hetero)arenes by heterobenzyl acetates under mild reaction conditions without requiring any additives or an inert atmosphere. Using this strategy, the gram-scale synthesis of indole-containing diarylmethane 13 has been accomplished in good yield
具有出色表面特性的质子交换蒙脱石(H-mont)可以在中孔中提供丰富的酸性位点,并且可以作为一种高效的非均相催化剂,用于通过(杂)芳烃的Friedel-Crafts烷基化合成含杂环的二芳基甲烷杂乙酸乙酸酯在温和的反应条件下不需要任何添加剂或惰性气氛。使用该策略,以高收率完成了含吲哚的二芳基甲烷13的克级合成,从而制备了Zafirlukast。此外,H-mont可用于乙酸杂苄酯5p与多种醇和1,3-二羰基化合物的亲核取代反应。