Tetrahydrofuran → HCID 66880483, compound

HRID 884876Notes

Reaction equation

HRID 884876 reaction equation
[Cl:1][C:2]1[C:3]([OH:21])=[C:4]([NH:12][C:13](=O)[C:14]2[CH:19]=[CH:18][N:17]=[CH:16][CH:15]=2)[CH:5]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:7]=1.O1CCCC1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1(C)C=CC=CC=1>[N:17]1[CH:16]=[CH:15][C:14]([C:13]2[O:21][C:3]3[C:2]([Cl:1])=[CH:7][C:6]([C:8]([F:9])([F:10])[F:11])=[CH:5][C:4]=3[N:12]=2)=[CH:19][CH:18]=1

Participants

6

Reactant 4

HCID 8028TetrahydrofuranHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 66879857HCID 66879857, compound

Product 1

HCID 66880483HCID 66880483, compound

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

To a mixture of 0.42 g of N-[3-chloro-5-(trifluoromethyl)-2-hydroxyphenyl]isonicotinamide, 5 ml of tetrahydrofuran and 0.38 g of triphenylphosphine, 0.64 g of 40% toluene solution of diethyl azodicarboxylate was added dropwise at room temperature. The reaction mixture was stirred while heating at room temperature for one hour and then at 50° C. for 2.5 hours. The reaction mixture was cooled to room temperature, and then concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 2-(pyridin-4-yl)-7-chloro-5-(trifluoromethyl)benzoxazole (hereinafter, referred to as “active compound 64”).

Workup

  1. additionwas added dropwise at room temperature
  2. temperatureThe reaction mixture was cooled to room temperature
  3. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-f7cdf87948c34707a07f5f56a33cb981
Source dataset
uspto-grants-2012_08
Patent number
US08242133B2

Reaction notes

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