Kinetic resolution of (±)-2,3-dihydro-3-methyl-4H-1,4-benzoxazine, (±)-2-methyl-1,2,3,4-tetrahydroquinoline and (±)-2-methylindoline using N-tosyl-(S)-prolyl chloride
摘要:
Acylation of racemic 2,3-dihydro-3-methyl-4H-1,4-benzoxazine, 2-methyl-1,2,3,4-tetrahydroquinoline and 2-methylindoline with N-tosyl-(S)-prolyl chloride resulted in their kinetic resolution with the predominant formation of (R,S)-diastereoisomeric amides. des being 80, 66 and 38%, respectively. Recrystallisation of the amides followed by acid hydrolysis gave individual (R)-enantiomers of heterocyclic amines. (C) 2003 Elsevier Science Ltd. All rights reserved.
Diastereoselective Acylation of Racemic Heterocyclic Amines with N-Tosyl-(S)-Prolyl Chloride and its Structural Analogs
作者:S. A. Vakarov、D. A. Gruzdev、E. N. Chulakov、L. Sh. Sadretdinova、M. A. Ezhikova、M. I. Kodess、G. L. Levit、V. P. Krasnov
DOI:10.1007/s10593-014-1538-8
日期:2014.9
resolution of racemic amines (2,3-dihydro-4H-1,4-benzoxazine and 1,2,3,4-tetrahydroquinoline derivatives) via diastereoselective acylation with N-tosyl-(S)-prolyl chloride and its structural analogs was performed. The effect of resolving agent structure on the stereoselectivity of heterocyclicamineacylation was examined. The highest stereoselectivity was achieved in the case of acylation with acyl chlorides
Kinetic resolution of heterocyclic amines by reaction with optically active acid chlorides. The effect of reaction conditions on the diastereoselectivity of acylation of (±)-3-methyl-2,3-dihydro-4H-1,4-benzoxazine
作者:V. P. Krasnov、G. L. Levit、M. A. Korolyova、I. M. Bukrina、L. Sh. Sadretdinova、I. N. Andreeva、V. N. Charushin、O. N. Chupakhin
DOI:10.1023/b:rucb.0000042282.29765.2f
日期:2004.6
of the reaction conditions (solvent, base) on the diastereoselectivity of acylation of (±)-3-methyl-2,3-dihydro-4H-1,4-benzoxazine with (S)-naproxen and N-tosyl-(S)-proline chlorides was studied. The highest diastereoselectivity was observed for the reaction carried out in benzene in the presence of aliphatic tertiary amines.