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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1350738Generated: October 26, 2026

Ethyl 3-oxovalerate → 5-Ethyl-1-isopropyl-1H-pyrazole-4-carbaldehyde

https://huagongshe.com/reaction/1350738

Reaction equation

Participants

RoleNameHCIDCharge
ReactantEthyl 3-oxovalerateHCID 78656—
Reactant1-Isopropylhydrazine hydrochlorideHCID 85573—
Reactant5-cyclopropyl-1-(propan-2-yl)-1H-pyrazole-4-carbaldehydeHCID 19620135—
Product5-Ethyl-1-isopropyl-1H-pyrazole-4-carbaldehydeHCID 21097341—

Reaction Steps

5-Ethyl-1-isopropyl-1H-pyrazole-4-carbaldehyde was prepared with ethyl 3-oxopentanoate and isopropyl hydrazine hydrochloride in the same manner as 5-cyclopropyl-1-isopropyl-1H-pyrazole-4-carbaldehyde (Example 49).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07214802B2
Source datasetuspto-grants-2007_05
ORD IDord-b5ac44e945ab455999229901f06095e0
Source noteuspto-grants-2007_05