Development of triazine-based esterifying reagents containing pyridines as a nucleophilic catalyst
作者:Kohei Yamada、Jie Liu、Munetaka Kunishima
DOI:10.1039/c8ob01660g
日期:——
as a nucleophilic catalyst. 1-(4,6-Dimethoxy-1,3,5-triazin-2-yl)-3,5-lutidinium chloride (DMT-3,5-LUT) was found to exhibit a superior reactivity for the dehydrating condensation reaction between carboxylic acids and alcohols. The reaction of DMT-3,5-LUT with carboxylic acids produces intermediacy of acyloxytriazines, which is known to exhibit moderate reactivity toward alcohols, with concomitant liberation
我们开发了新的基于三嗪的酯化试剂,该试剂包含可充当亲核催化剂的吡啶。发现1-(4,6-二甲氧基-1,3,5-三嗪-2-基)-3,5-氯化lut(DMT-3,5-LUT)对三氯甲烷之间的脱水缩合反应显示出优异的反应活性羧酸和醇。DMT-3,5-LUT与羧酸的反应产生了酰氧基三嗪的中间体,已知该酰氧基三嗪对醇表现出适度的反应性,并伴有3,5-二甲基吡啶的释放。3,5-二甲基吡啶作为亲核催化剂的作用可加速随后的酰氧基三嗪和醇化学转化成酯。还讨论了通过反应的时程分析揭示的详细反应机理。