Hydrochloric Acid → 3-(4-Trifluoromethoxy-phenylamino)-isonicotinic acid

HRID 39602

Reaction equation

HRID 39602 reaction equation
F[C:2]1[CH:10]=[N:9][CH:8]=[CH:7][C:3]=1[C:4]([OH:6])=[O:5].[F:11][C:12]([F:22])([F:21])[O:13][C:14]1[CH:20]=[CH:19][C:17]([NH2:18])=[CH:16][CH:15]=1.[Li+].C[Si]([N-][Si](C)(C)C)(C)C.Cl>C1COCC1>[F:11][C:12]([F:21])([F:22])[O:13][C:14]1[CH:15]=[CH:16][C:17]([NH:18][C:2]2[CH:10]=[N:9][CH:8]=[CH:7][C:3]=2[C:4]([OH:6])=[O:5])=[CH:19][CH:20]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 3453613-Fluoropyridine-4-carboxylic acidHCID 6008484-(Trifluoromethoxy)anilineHCID 2733832Lithium Hexamethyldisilazide

Product 1

HCID 576496383-(4-Trifluoromethoxy-phenylamino)-isonicotinic acidYield 9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-78 °C

Procedure

3-Fluoro-isonicotinic acid (50 mg, 0.354 mmol) and 4-(trifluoromethoxy)aniline (62.8 mg, 0.354 mmol) was added to 2 ml dry THF and the mixture was cooled to −78° C. LiHMDS (1M in THF, 1.24 ml) was added and the mixture was allowed to warm to room temperature over night. Hydrochloric acid (1M in methanol, 5 ml) was added and the volatiles were removed in vacuo. The crude material was purified by preparative HPLC to give 9.5 mg (32 μmol; 9% yield) of pure desired product.

Workup

  1. temperatureto warm to room temperature over night
  2. customthe volatiles were removed in vacuo
  3. customThe crude material was purified by preparative HPLC

Sources & evidence

ORD record
ord-68aa3eff66cc499abf1b2121278b6d86
Source dataset
uspto-grants-2013_09
Patent number
US08524911B2

Linked notes

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