Novel cyclic amino acids which are useful in preparing biologically active peptides as well as a process for the preparation of D and L enantiomers of the cyclic amino acids are described where an N-protected derivative of the racemic cyclic amino acid is treated with (-)cinchonidine and the resulting salt resolved into the desired enantiomers, as well as derivatives thereof and valuable intermediates used in the process.
本发明涉及一种新型的环状
氨基酸,可用于制备
生物活性肽,以及制备环状
氨基酸的D和L对映体的方法。该方法是通过将外消旋环状
氨基酸的N-保护衍
生物与(-)
金鸡纳
碘盐反应,将产生的盐分离成所需的对映体,以及在该过程中使用的有价值的中间体和衍
生物。