作者:Margarita Parra、Claudia Della Rosa、Salvador Gil、Pablo Rodríguez
DOI:10.1055/s-2006-950181
日期:——
addition of the dianions of carboxylic acids to isocyanates is presented. The use of sub-stoichiometric amounts of the amine in the generation of the dianion leads to an optimized process, which prevents the formation of urea derivatives due to the secondary reaction of isocyanates with the amine. This methodology is a new approach to the synthesis of β-amino acids with better control of α-substitution
介绍了将羧酸的双阴离子添加到异氰酸酯中的详细研究。在二阴离子的产生中使用亚化学计量的胺导致优化的过程,这防止了由于异氰酸酯与胺的二次反应而形成脲衍生物。这种方法是一种合成 β-氨基酸的新方法,比以前描述的更好地控制 α-取代。