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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1445534Generated: November 1, 2026

Ethanol → 4-[(4-(Hydroxydiphenylmethyl)-1-piperidinyl]-1-hydroxybutyl]-alpha,alpha-dimethylbenzeneacetic acid hydrochloride hydrate

https://huagongshe.com/reaction/1445534

Reaction equation

Participants

RoleNameHCIDCharge
ReactantEthanolHCID 702—
ReactantFexofenadine HydrochlorideHCID 63002—
SolventWaterHCID 962—
Product4-[(4-(Hydroxydiphenylmethyl)-1-piperidinyl]-1-hydroxybutyl]-alpha,alpha-dimethylbenzeneacetic acid hydrochloride hydrateHCID 11613748181.9%

Reaction Conditions

Temperature80 °C

Reaction Steps

Treat 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-hydroxybutyl]-α,α-dimethylbenzeneacetic acid hydrochloride (Form I) (2.0 g) with ethanol (4 mL) and deionized water (20 mL). Heat at 80° C. until a solution is formed and then stir at room temperature for 23 hours. Filter the resulting slurry, wash with water (2×10 mL) and dry under vacuum at 35° C. overnight to give the title compound (1.88 g); mp 100-105° C.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07666881B2
Source datasetuspto-grants-2010_02
ORD IDord-dba5cf92a178439ca346956d8f648582
Source noteuspto-grants-2010_02