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-aminoacids with better control of α-substitution