Preparation of cycloalkane-fused dihydropyrimidin-4(3H)-one enantiomers
摘要:
Racemic cis-2-amino-1-cyclopentane- or -cyclohexane-1-carboxylic acid was reacted with (R)-alpha-methylbenzylamine to form homochiral amides 3, 4 and 8, 9. The ring closures of 3, 4 and 8, 9 with aryl imidates resulted in cyclopentane cis-fused and cyclohexane cis- and trans-fused dihydropyrimidin-4-one enantiomers with loss of the N-substituent. The absolute configurations were determined by hydrolysis of 5, 6 and 10-13 to the corresponding amino acids. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
Preparation of cycloalkane-fused dihydropyrimidin-4(3H)-one enantiomers
作者:Zsolt Szakonyi、Ferenc Fülöp、Gábor Bernáth、Gabriella Török、Antal Péter
DOI:10.1016/s0957-4166(98)00069-x
日期:1998.3
Racemic cis-2-amino-1-cyclopentane- or -cyclohexane-1-carboxylic acid was reacted with (R)-alpha-methylbenzylamine to form homochiral amides 3, 4 and 8, 9. The ring closures of 3, 4 and 8, 9 with aryl imidates resulted in cyclopentane cis-fused and cyclohexane cis- and trans-fused dihydropyrimidin-4-one enantiomers with loss of the N-substituent. The absolute configurations were determined by hydrolysis of 5, 6 and 10-13 to the corresponding amino acids. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.