N, N’-dimethyl formamide (DMF) mediated Vilsmeier–Haack adducts with 1,3,5-triazine compounds as efficient catalysts for the transesterification of β-ketoesters
作者:Govardhan Duguta、Chinna Rajanna Kamatala、Satish Kumar Mukka、Bhooshan Muddam、Yadaiah Chityala
DOI:10.1080/00397911.2020.1750033
日期:2020.6.2
Abstract N, N’-dimethyl formamide (DMF) mediated Vilsmeier–Haack (VH) adducts with 1,3,5-triazine compunds such as trichloroisocyanuric acid (TCCA) and trichlorotriazine (TCTA) were prepared by replacing classical oxy chlorides POCl3, and SOCl2, which were explored as efficient catalysts for the transesterification of β-ketoesters. The prepared (TCCA/DMF) and (TCTA/DMF) adducts improved greenery of
摘要 通过取代经典的氯氧氯化物 POCl3,制备了 N, N'-二甲基甲酰胺 (DMF) 介导的 Vilsmeier-Haack (VH) 加合物与三氯异氰尿酸 (TCCA) 和三氯三嗪 (TCTA) 等 1,3,5-三嗪化合物。 SOCl2,被探索作为β-酮酯酯交换的有效催化剂。制备的 (TCCA/DMF) 和 (TCTA/DMF) 加合物改善了经典 Vilsmeier-Haack 试剂 (POCl3/DMF) 和 (SOCl2/DMF) 的绿色,并证明了它们更好的催化活性。反应时间范围:3.5 到 6.5 小时(SOCl2/DMF);2.8–5.2 小时(POCl3/DMF);2.5–5.2 小时 (TCCA/DMF) 和 2.5–5.0 小时 (TCTA/DMF) 催化系统。使用这些试剂的超声波 (US) 辅助方案进一步缩短了反应时间(两到三倍),而使用这些试剂的微波辅助 (MW) 协议要有效得多。与美国辅助反应相比,在