in order to evaluate systematically the influence of the structures of the acyl group in the chiral thiol reagents , a series of novel n-acyl-l-cysteines was synthesized [ acyl = n-butyryl , isobutyryl ( i-but ) , pivaloyl , benzoyl ) and the chromatographic behaviour of the diastereomers formed was compared with those of already known reagents , n-acetyl-l-cysteine and n-ter.-butyloxycarbonyl-l-cysteine .
C0001047
n-acetyl-l-cysteine
C0010654
l-cysteine