The crossed aldol reaction of enol esters, which are weak carbon nucleophiles, with aldehydes was effectively carried out under mild conditions by using a catalytic amount of several cationic species paired with tetrakis(pentafluorophenyl)borate.
酮酸酯的交叉 aldol 反应,作为弱的碳亲核试剂,与醛在温和条件下有效进行,使用小量的几种阳离子物质与
四氟苯基
硼酸盐配对催化。