Oxalyl chloride → 5-[2'-Methyl-2-(trifluoromethyl)biphenyl-4-YL]-3-[2-(trifluoromethoxy)phenyl]-1,2,4-oxadiazole

HRID 336294Notes

Reaction equation

C(Cl)(=O)C(Cl)=O.[CH3:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[C:14]1[CH:19]=[CH:18][C:17]([C:20]([OH:22])=O)=[CH:16][C:15]=1[C:23]([F:26])([F:25])[F:24].O[N:28]=[C:29]([C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][C:32]=1[O:37][C:38]([F:41])([F:40])[F:39])[NH2:30].CCN(C(C)C)C(C)C>>[CH3:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[C:14]1[CH:19]=[CH:18][C:17]([C:20]2[O:22][N:30]=[C:29]([C:31]3[CH:36]=[CH:35][CH:34]=[CH:33][C:32]=3[O:37][C:38]([F:39])([F:40])[F:41])[N:28]=2)=[CH:16][C:15]=1[C:23]([F:24])([F:26])[F:25]

Participants

Reactant 4

HCID 65578Oxalyl chloride

HCID 81531Diisopropylethylamine

HCID 2794708N'-hydroxy-2-(trifluoromethoxy)benzenecarboximidamide

HCID 594958132'-Methyl-2-(trifluoromethyl)-[1,1'-biphenyl]-4-carboxylic acid

Product 1

HCID 252566585-[2'-Methyl-2-(trifluoromethyl)biphenyl-4-YL]-3-[2-(trifluoromethoxy)phenyl]-1,2,4-oxadiazole

Procedure

Oxalyl chloride (109 μL; 1.28 mmol; 3 eq.), Intermediate 34 (120 mg; 0.43 mmol; 1 eq.), Intermediate 2 (94 mg; 0.43 mmol, 1 eq.) and DIEA (221 μL; 1.28 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 white solid.

Workup

customPurification by column chromatography c-hexane/ethyl acetate, 95/5)

Sources & evidence

ORD record: ord-3e5c08702c72430490640dead6339767
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08889668B2

Reaction notes

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