L-(+)-Cysteine → 2-(3-Quinolyl)thiazolidine-4-carboxylic acid
Reaction equation
[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[C:3]([CH:11]=O)[CH:2]=1.[NH2:13][C@H:14]([C:17]([OH:19])=[O:18])[CH2:15][SH:16]>C(O)C>[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[C:3]([CH:11]2[NH:13][CH:14]([C:17]([OH:19])=[O:18])[CH2:15][S:16]2)[CH:2]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
Quinoline-3-carbaldehyde (1.57 g) and 1.21 g of L-cysteine were dissolved in 50 ml of 50% ethanol, and the solution was stirred at room temperature for 1 hour. The resultant crystalline precipitate was collected by suction filtrating, washed with 50% ethanol and dried to give 1.95 g of 2-(3-quinolyl)thiazolidine-4-carboxylic acid. Melting point 173°-175° C. (decomposition).