Abstract An enviro-economic protocol has been described for the synthesis of bis-tetronic acids by pseudo-three-component condensation between aldehydes/isatins and tetronic acid using sulfamic acid as a solid acid catalyst. Easy commercial availability of the catalyst at extremely low cost, excellent yields and avoidance of conventional purification procedures are the main merits of this energy efficient
摘要 已经描述了使用
氨基磺酸作为固体酸催化剂通过醛/
靛红与四氢
萘酸之间的拟三组分缩合来合成双四氢
萘酸的环境经济方案。该能源高效方案的主要优点是,可以以极低的成本轻松获得商业上可得的催化剂,优异的收率并避免使用常规的纯化程序。 图形概要