Hydrochloric Acid → 5-[(3-fluorobenzyl)sulfanyl]-3-hydroxypyridin-2(1H)-one
Reaction equation
[F:1][C:2]1[CH:3]=[C:4]([CH:21]=[CH:22][CH:23]=1)[CH2:5][S:6][C:7]1[CH:8]=[C:9]([O:17]COC)[C:10]([O:13]COC)=[N:11][CH:12]=1.Cl>O1CCOCC1>[F:1][C:2]1[CH:3]=[C:4]([CH:21]=[CH:22][CH:23]=1)[CH2:5][S:6][C:7]1[CH:8]=[C:9]([OH:17])[C:10](=[O:13])[NH:11][CH:12]=1Participants
4
Procedure
To a solution of 5-[(3-fluorobenzyl)sulfanyl]-2,3-bis(methoxymethoxy)pyridine (Intermediate 43; 690 mg, 2.03 mmol) in dioxane (4 ml) was added a solution of hydrogen chloride in dioxane (4.0 M; 2.54 ml, 10.17 mmol) and the reaction stirred for 16 hours before being concentrated in vacuo. The crude product was recrystallised from ethanol and water to yield 5-[(3-fluorobenzyl)sulfanyl]-3-hydroxypyridin-2(1H)-one as a pale grey solid (309 mg, 61%).