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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2301729Generated: October 31, 2026

Hydrochloric Acid → 2-Cyclopenten-1-one, 2-pentyl-

https://huagongshe.com/reaction/2301729

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
Reactant3-MethylpyridineHCID 7970—
ReactantSodium HydroxideHCID 14798—
Product2-Cyclopenten-1-one, 2-pentyl-HCID 11754980.8%

Reaction Steps

In accordance with Example 6, the reaction with dropping addition was carried out by using 7.42 g (0.080 mol) of 3-picoline and 5.54 g (0.053 mol) of a 35% hydrochloric acid. After the dropping addition was finished, the resultant mixture was stirred for 5 hours under heating at the same temperature. After the reaction was finished, the mixture was cooled to the room temperature and neutralized with an aqueous solution of sodium hydroxide. Then, the resultant organic layer was analyzed in the same manner as in Example 1. As the result, 65.2 g of 2-pentyl-2-cyclopentenone were obtained (yield: 80.8%).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06500990B2
Source datasetuspto-grants-2002_12
ORD IDord-258f8d6b955d4ecf994413088fb18083
Source noteuspto-grants-2002_12