Substituent effect on the stereoselectivity of acylation of racemic heterocyclic amines with N-phthaloyl-3-aryl-(S)-alanyl chlorides
作者:Galina L. Levit、Dmitry A. Gruzdev、Victor P. Krasnov、Evgeny N. Chulakov、Liliya Sh. Sadretdinova、Marina A. Ezhikova、Mikhail I. Kodess、Valery N. Charushin
DOI:10.1016/j.tetasy.2010.12.017
日期:2011.1
The acylative kinetic resolution of racemic 2-methyl-1,2,3,4-tetrahydroquinoline and 2,3-dihydro-3-methyl-4H-1,4-benzoxazine using acyl chlorides of N-phthaloyl-(S)-phenylalanine, N-phthaloyl-3-(4-nitrophenyl)-(S)-alanine and N-phthaloyl-O-methyl-(S)-tyrosine as chiral resolving agents has been carried out. It is shown that the effectiveness of an acylative kinetic resolution depends on the electronic
使用N-邻苯二甲酰基- (S)-的酰氯进行外消旋的2-甲基-1,2,3,4-四氢喹啉和2,3-二氢-3-甲基-4 H -1,4-苯并恶嗪的酰基动力学拆分已经进行了作为手性拆分剂的苯丙氨酸,N-邻苯二甲酰基-3-(4-硝基苯基)-(S)-丙氨酸和N-邻苯二甲酰基-O-甲基-(S)-酪氨酸的制备。结果表明,酰基化动力学拆分的有效性取决于酰化剂苯基片段中取代基的电子效应,并随着苯基片段中对位取代基(OMe> H> NO 2)的给电子性质而增加。的N-邻苯二甲酰基-3-芳基-(S)-丙氨酰氯增加; 在降低的温度下进行该过程也有助于提高动力学分辨率。