One-Pot Synthesis of Arylsulfonamides and Azetidine-2,4-diones via Multicomponent Reaction of an Amine, an Acetylenic Compound, and an Arylsulfonyl Isocyanate
作者:Abdolali Alizadeh、Atieh Rezvanian
DOI:10.1055/s-2008-1067026
日期:2008.6
(dialkyl acetylenedicarboxylates or alkyl propiolates) with an arylsulfonylisocyanate. These arylsulfonamides show dynamic NMR behavior in solution. A different reactivity pattern was observed with the methyl 3-(diethylamino)acrylate. The latter, generated in situ from Et 2 NH and methyl propiolate, on reaction with an arylsulfonylisocyanate afforded exclusively the azetidine-2,4-dione (malonimide-)
描述了一种获得新型芳基磺酰胺的有效途径。它涉及通过将伯胺或仲胺加成到乙炔羧酸盐(乙炔二羧酸二烷基酯或丙醇烷基酯)中得到的烯胺与芳基磺酰基异氰酸酯的反应。这些芳基磺酰胺在溶液中显示出动态 NMR 行为。用 3-(二乙氨基)丙烯酸甲酯观察到不同的反应模式。后者由 Et 2 NH 和丙炔酸甲酯原位生成,在与芳基磺酰基异氰酸酯反应时以良好的收率仅提供氮杂环丁烷-2,4-二酮(丙二酰亚胺-)衍生物。这些丙二酰亚胺在溶液中也显示出动态 NMR 行为,因为侧链 N 原子与相邻的 α,β-不饱和羰基共轭导致围绕 CN 键的旋转受限。