← Back to patent-cliff list
CAS 1998-11-3
benzenesulfonic acid
Codes: BEPO-007
Application context (from source-drug indications)
Allergic rhinitisBepotastine besilateUrticariaBepotastine besilate痒疹Bepotastine besilateAllergic conjunctivitisBepotastine besilatePerennial allergic rhinitisBepotastine besilateInfectious skin diseaseBepotastine besilate
Source drugs (routes using this intermediate)
| Drug | Tier | Expiry |
|---|---|---|
| Bepotastine besilate | 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.
2-((4-chlorophenyl)(piperidin-4-yloxy)methyl)pyridine→ethyl 4-bromobutanoate→(S)-2-((4-chlorophenyl)(piperidin-4-yloxy)methyl)pyridine→(S)-ethyl 4-(4-((4-chlorophenyl)(pyridin-2-yl)methoxy)piperidin-1-yl)butanoate→(S)-4-(4-((4-chlorophenyl)(pyridin-2-yl)methoxy)piperidin-1-yl)butanoic acid→benzenesulfonic acid
2-((4-chlorophenyl)(piperidin-4-yloxy)methyl)pyridine→(S)-4-(4-((4-chlorophenyl)(pyridin-2-yl)methoxy)piperidin-1-yl)butanoic acid→benzenesulfonic acid→4-chlorobutanoyl chloride→(1R,2S,5R)-2-isopropyl-5-methylcyclohexan-1-ol→(1R,2S,5R)-2-isopropyl-5-methylcyclohexyl 4-bromobutanoate→(1R,2S,5R)-2-isopropyl-5-methylcyclohexyl 4-(4-((S)-(4-chlorophenyl)(pyridin-2-yl)methoxy)piperidin-1-yl)butanoate→piperidin-4-ol→1-(4-hydroxypiperidin-1-yl)ethanone→2-(chloro(4-chlorophenyl)methyl)pyridine
Intermediates available on this site
No listed intermediates for this target yet — send an RFQ directly and it will enter our matching pool.
This is a CAS-level registry record: registrations across routes are merged. Supplier offers and buyer demands will be matched on this CAS as the primary key.