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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1697643Generated: October 29, 2026

Lawesson's reagent → (2S,4R)-1-[5-Cyclopropyl-2-(4-trifluoromethyl-phenyl)-2H-pyrazol-3-yl]-4-(2-trifluoromethyl-benzenesulfonyl)-pyrrolidine-2-carboxylic Acid Methyl Ester

https://huagongshe.com/reaction/1697643

Reaction equation

Participants

RoleNameHCIDCharge
ReactantLawesson's reagentHCID 87949—
Reactant4-(Trifluoromethyl)phenylhydrazineHCID 136200—
Reactant(2S,4R)-1-(3-Cyclopropyl-3-oxo-propionyl)-4-(2-trifluoromethyl-benzenesulfonyl)-pyrrolidine-2-carboxylic Acid Methyl EsterHCID 86646850—
Product(2S,4R)-1-[5-Cyclopropyl-2-(4-trifluoromethyl-phenyl)-2H-pyrazol-3-yl]-4-(2-trifluoromethyl-benzenesulfonyl)-pyrrolidine-2-carboxylic Acid Methyl EsterHCID 86646851—

Reaction Steps

In analogy to the procedure described in example 192 h, (2S,4R)-1-(3-cyclopropyl-3-oxo-propionyl)-4-(2-trifluoromethyl-benzenesulfonyl)-pyrrolidine-2-carboxylic acid methyl ester was reacted with was reacted with Lawesson's reagent (CAS Reg. No. 19172-47-5) and 4-(trifluoromethyl)phenylhydrazine (CAS Reg. No. 368-90-1) to give the title compound as yellow oil.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08163793B2
Source datasetuspto-grants-2012_04
ORD IDord-60b1851f5949400699c8971dc5eac981
Source noteuspto-grants-2012_04