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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 336293Generated: October 26, 2026

Oxalyl chloride → 5-[3-Methoxy-4-(4-methyl-3-thienyl)phenyl]-3-[2-(trifluoromethoxy)phenyl]-1,2,4-oxadiazole

https://huagongshe.com/reaction/336293

Reaction equation

Participants

RoleNameHCIDCharge
ReactantOxalyl chlorideHCID 65578—
ReactantDiisopropylethylamineHCID 81531—
ReactantN'-hydroxy-2-(trifluoromethoxy)benzenecarboximidamideHCID 2794708—
Reactant3-Methoxy-4-(4-methyl-3-thienyl)benzoic acidHCID 59495795—
Product5-[3-Methoxy-4-(4-methyl-3-thienyl)phenyl]-3-[2-(trifluoromethoxy)phenyl]-1,2,4-oxadiazoleHCID 25256657—

Reaction Steps

Oxalyl chloride (123 μL; 1.45 mmol; 3 eq.), Intermediate 29 (120 mg; 0.48 mmol; 1 eq.), Intermediate 2 (106 mg; 0.48 mmol, 1 eq.) and DIEA (250 μL; 1.45 mmol; 3 eq.) were reacted according to general procedure 2. Purification by column chromatography c-hexane/ethyl acetate, 95/5) afforded the title compound as a yellow oil.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08889668B2
Source datasetuspto-grants-2014_11
ORD IDord-af0b55abe4d2445bb600041016c7fc88
Source noteuspto-grants-2014_11