반응 #931716

반응 방정식

L-(+)-cysteine hydrochloride

natriumacetate trihydrate

4-Cyanobenzaldehyde

→

2-(RS)-(4-cyanophenyl)thiazolidine-4-(R)-carboxylic acid

수율 44.9%

용매

water

ethanol

반응 조건

후처리

1. 1
   workup.ADDITIONwas added
2. 2
   여과the white crystals were collected by filtration
3. 3
   세척washed twice with 15 ml of water:ethanol (1:1)

실험 절차

4-Cyanobenzaldehyde (500 mg, 3.8 mmol) was dissolved in 5 ml of ethanol (96%) and L-(+)-cysteine hydrochloride (460 mg, 3.8 mmol) and natriumacetate trihydrate (468 mg, 5.7 mmol) dissolved in 5 ml of water was added. The reaction mixture was stirred for 16 hours at room temperature and the white crystals were collected by filtration and washed twice with 15 ml of water:ethanol (1:1), to afford 400 mg of 2-(RS)-(4-cyanophenyl)thiazolidine-4-(R)-carboxylic acid (48) in 44% yield. 1H-NMR (MEOH, 300 MHz) δ: 7.69 (m, 4H); 5.81 (s, ½H); 5.60 (s, ½H); 4.23 (dd, ½H); 4.02 (dd, ½H); 3.52-3.17 (m, 2H).

출처