Oxalyl chloride → HCID 66831947, compound

HRID 58649Notes

Reaction equation

HRID 58649 reaction equation
[F:1][C:2]1[C:7]([F:8])=[C:6]([F:9])[CH:5]=[CH:4][C:3]=1[CH2:10][C:11]([OH:13])=O.C(Cl)(=O)C(Cl)=O.[NH2:20][C:21](=[N:27]O)[C:22]([O:24][CH2:25][CH3:26])=[O:23].C(N(CC)C(C)C)(C)C>ClCCl.N1C=CC=CC=1.CN(C=O)C>[F:1][C:2]1[C:7]([F:8])=[C:6]([F:9])[CH:5]=[CH:4][C:3]=1[CH2:10][C:11]1[O:13][N:27]=[C:21]([C:22]([O:24][CH2:25][CH3:26])=[O:23])[N:20]=1

Participants

8

Reactant 4

HCID 65578Oxalyl chlorideHCID 81531DiisopropylethylamineHCID 27779452-(2,3,4-Trifluorophenyl)acetic acidHCID 6785548Ethyl 2-amino-2-(hydroxyimino)acetate

Product 1

HCID 66831947HCID 66831947, compoundYield 12%

Reagents, catalysts & solvents 3

HCID 1049PyridineSolventHCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent2×

Procedure

This compound was prepared according to general method 2 with (step I) 2-(2,3,4-trifluorophenyl)acetic acid (0.360 g; 1.89 mmol) and oxalyl chloride (0.176 mL; 2.08 mmol) in dichloromethane (12 mL) with few drops of DMF and (step II) ethyl 2-amino-2-(hydroxyimino)acetate (0.250 g; 1.89 mmol) and N,N diisopropylethylamine (0.527 mL; 3.03 mmol) in dichloromethane (10 mL) and (step III) pyridine (18 mL). The crude material was purified by flash chromatography on silica (eluent 20 to 100% ethyl acetate in heptane) to yield 0.065 g (12%) of ethyl 5-(2,3,4-trifluorobenzyl)-1,2,4-oxadiazole-3-carboxylate as a white solid.

Workup

  1. customThis compound was prepared
  2. customThe crude material was purified by flash chromatography on silica (eluent 20 to 100% ethyl acetate in heptane)

Sources & evidence

ORD record
ord-7d7925d20d864a13979ce9c001ece387
Source dataset
uspto-grants-2016_09
Patent number
US09434722B2

Reaction notes

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