Synthesis of α-nitro derivatives of δ-oxocarboxylic and glutaric acids in heterogeneous catalytic system ionic liquid—KHCO3
作者:S. G. Zlotin、G. V. Kryshtal、G. M. Zhdankina、A. V. Bogolyubov、S. G. Postikova、V. A. Tartakovsky
DOI:10.1007/s11172-007-0230-x
日期:2007.8
An expedient method for the synthesis of α-nitro-δ-oxocarboxylic and α-nitroglutaric acid esters, including ones with isoprenoid substituents, by the solvent-free reaction of the corresponding alkyl α-nitrocarboxylates with activated olefins, assisted by heterogeneous catalytic system KHCO3—1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), was elaborated. The product yields remain stable
一种合成 α-硝基-δ-氧代羧酸和 α-硝基戊二酸酯(包括具有类异戊二烯取代基的酯)的简便方法,通过相应的 α-硝基羧酸烷基酯与活化烯烃的无溶剂反应,在非均相催化系统 KHCO3 的协助下-1-丁基-3-甲基咪唑鎓四氟硼酸盐([bmim][BF4]),被详细说明。即使在催化系统循环 8 次后,产品收率也保持稳定。合成的 2-(聚) 异戊二烯基-2-硝基戊二酸二甲酯在 AcOH 中用 Fe 处理后被还原为 2-(聚) 异戊二烯基-5-氧代吡咯烷-2-羧酸盐。