Synthesis and characterization of novel polystyrene-supported TBD catalysts and their use in the Michael addition for the synthesis of Warfarin and its analogues
作者:Matteo Alonzi、Maria Paola Bracciale、Alessandra Broggi、Daniela Lanari、Assunta Marrocchi、Maria Laura Santarelli、Luigi Vaccaro
DOI:10.1016/j.jcat.2013.10.009
日期:2014.1
the search for efficient and polymeric supports for organic bases to be used in environmentally friendly media and conditions, novel polystyrene-bound 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) has been prepared and characterized. Their catalytic properties have been tested in the Michael additions of 4-hydroxycoumarin to α,β-unsaturated ketones as a representative useful process for the syntheses of
在寻找用于环境友好介质和条件的有机碱的有效和聚合载体时,已制备并表征了新型聚苯乙烯键合的1,5,7-三氮杂双环[4.4.0] dec-5-ene(TBD) 。它们的催化性能已通过在4-羟基香豆素与α,β-不饱和酮的迈克尔加成反应中进行了测试,这是合成4-羟基-3-(3-氧代-1-苯基丁基)-2H-铬- 2-one(Warfarin™),4-羟基-3-(1-(4-(硝基硝基苯基)-3-氧丁基)-2H-chromen-2-one(Acenocumarol™),4-羟基-3-(1-( 4-氯苯基)-3-氧丁基)-2H-铬-2-酮(Coumachlor™)和4-羟基-3-(1-(4-甲氧基苯基)-3-氧丁基)-2H-铬-2-酮。以高到定量的转化产率获得产物。新的催化体系显示出令人鼓舞的催化性能,