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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1439632Generated: October 30, 2026

p-Toluenesulfonic acid monohydrate → Butanoic acid, 4-(2-oxocyclopentyl)-, ethyl ester

https://huagongshe.com/reaction/1439632

Reaction equation

Participants

RoleNameHCIDCharge
Reactantp-Toluenesulfonic acid monohydrateHCID 521998—
ReactantButanoic acid, 4-(2-oxocyclopentyl)-HCID 558495—
SolventEthanolHCID 702—
ProductButanoic acid, 4-(2-oxocyclopentyl)-, ethyl esterHCID 558493—

Reaction Steps

In the manner described in Example 3, treatment of 2-(3-carboxypropyl)cyclopentan-1-one (Example 5) with p-toluenesulfonic acid monohydrate in ethanol gives a colorless oil, b.p. 93° C. (0.10 mm).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04060540
Source datasetuspto-grants-1977_11
ORD IDord-741341810ff542b19635414ebb807db5
Source noteuspto-grants-1977_11