Proline in the presence of sodium hydrogen carbonate has been found to be an effective catalyst for the Baylis–Hillman reaction between methyl or ethyl vinyl ketone and aryl aldehydes. Screening of several amine catalysts showed that an ionizable carboxylic function directly linked to the secondary amine catalyst plays an important role in the synthesis of the desired product in good yield. The data
已发现在
碳酸氢钠存在下脯
氨酸是甲基或乙基
乙烯基酮与芳醛之间 Baylis-Hillman 反应的有效催化剂。对几种胺催化剂的筛选表明,直接与仲胺催化剂相连的可电离羧基官能团在以高产率合成所需产物中起着重要作用。获得的数据使我们首次提出脯
氨酸、
肌氨酸、
哌可啉酸和高脯
氨酸可以通过双环烯
氨基内酯作为中间体作为双功能催化剂。量子力学计算(PM3/COSMO 和 ab initio 3-21G/COSMO)支持这种机制并更深入地了解
碳酸氢盐的作用。(© Wiley-
VCH Verlag GmbH & Co. KGaA,69451 Weinheim,德国,2008 年)