A biomaterial supported organocatalyst, readily synthesized by the reaction of chemically modified sulfonic group containing expanded corn starch with pyridine exhibited excellent catalytic activity for the synthesis of β-amino carbonyls in excellent yields via aza-Michael addition of amines to electron deficient alkenes. A remarkable enhancement in the reaction rates was observed with the prepared bifunctional organocatalyst in comparison to the either starch grafted sulfonic acid or the corresponding homogeneous pyridinium p-toluenesulfonate.
一种由
化学改性的含
磺酸基团的膨胀玉米淀粉与
吡啶反应合成的
生物材料负载型有机催化剂,在胺与缺电子烯烃的aza-Michael加成反应中,表现出优异的催化活性,可高效合成β-
氨基羰基化合物。与淀粉接枝
磺酸酸或相应的均相
吡啶盐-
对甲苯磺酸盐相比,所制备的双功能有机催化剂显著提高了反应速率。