family of H-bond donor organocatalysts, are reported. The catalysts could be synthesized within two steps. Among them, H8-binaphthyl-linked hemisquaramide 7 markedly accelerated the synthesis of cyclic carbonates from epoxides and CO2. The reactions proceeded well under mild and solvent-free conditions. Kinetic resolution was also achieved at −20 °C (s = 3.0). The adjustable bite angle and orientation
据报道,一种半新的氢键镊子,一种新型的氢键供体有机催化剂。催化剂可以在两个步骤内合成。其中,H 8-联
萘基连接的半quarquaramide 7明显地促进了由
环氧化物和CO 2合成环状
碳酸酯。反应在温和且无溶剂的条件下进行得很好。在-20°C(s = 3.0)时也达到了动力学拆分。催化剂的两个NH基团的可调节的咬合角和取向对于高活性很重要。