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CAS 4780-14-7
3-Methoxy-2-methyl-4H-pyran-4-one
Codes：S-pantoprazole sodium-047
Application context (from source-drug indications)
胃食管反流病（S）-泮托拉唑钠消化性溃疡（S）-泮托拉唑钠出血（S）-泮托拉唑钠创伤和损伤（S）-泮托拉唑钠昏迷（S）-泮托拉唑钠吸入性肺炎（S）-泮托拉唑钠
Source drugs (routes using this intermediate)
| Drug | Tier | Expiry |
|---|---|---|
| （S）-泮托拉唑钠S-pantoprazole sodium | Tier C — Watch / trade | - |
Position in synthesis routes (up/downstream chain)
Ordered by route registration; left → right is the synthesis direction. The highlighted node is the current CAS; others link to their own profiles.
3-Hydroxy-2-methyl-4H-pyran-4-one→3-Methoxy-2-methyl-4H-pyran-4-one→3-Methoxy-2-methylpyridin-4-one→4-Chloro-3-methoxy-2-methylpyridine→5-(Difluoromethoxy)-1H-benzimidazole-2-thiol→4-Chloro-3-methoxy-2-methylpyridine 1-oxide→3,4-Dimethoxy-2-methylpyridine 1-oxide→(3,4-Dimethoxypyridin-2-yl)methanol→2-(Chloromethyl)-3,4-dimethoxypyridine hydrogen chloride→5-(Difluoromethoxy)-2-(3,4-dimethoxypyridin-2-ylmethylsulfanyl)-1H-benzimidazole→5-(Difluoromethoxy)-2-(3,4-dimethoxypyridin-2-ylmethylsulfinyl)-1H-benzimidazole
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