HCID 68490041, compound → 2-{6-[2-(4-Fluoro-phenyl)-ethyl]-pyrazin-2-yl}-4-methyl-thiazole-5-carboxylic acid 4-fluoro-benzylamide

HRID 1879167Notes

Reaction equation

HRID 1879167 reaction equation
[F:1][C:2]1[CH:32]=[CH:31][C:5]([CH2:6][NH:7][C:8]([C:10]2[S:14][C:13]([C:15]3[CH:20]=[N:19][CH:18]=[C:17](/[CH:21]=[CH:22]/[C:23]4[CH:28]=[CH:27][C:26]([F:29])=[CH:25][CH:24]=4)[N:16]=3)=[N:12][C:11]=2[CH3:30])=[O:9])=[CH:4][CH:3]=1>C(OCC)(=O)C.C(O)C.[Pd]>[F:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:6][NH:7][C:8]([C:10]2[S:14][C:13]([C:15]3[CH:20]=[N:19][CH:18]=[C:17]([CH2:21][CH2:22][C:23]4[CH:28]=[CH:27][C:26]([F:29])=[CH:25][CH:24]=4)[N:16]=3)=[N:12][C:11]=2[CH3:30])=[O:9])=[CH:31][CH:32]=1

Participants

4

Reactant 1

HCID 68490041HCID 68490041, compound

Product 1

HCID 249550612-{6-[2-(4-Fluoro-phenyl)-ethyl]-pyrazin-2-yl}-4-methyl-thiazole-5-carboxylic acid 4-fluoro-benzylamideYield 76%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 21584252Ethanol ethylacetateSolvent

Procedure

Part B. To a solution of 2-{6-[(E)-2-(4-fluoro-phenyl)-vinyl]-pyrazin-2-yl}-4-methyl-thiazole-5-carboxylic acid 4-fluoro-benzylamide (150 mg, 0.33 mmol, 1.0 equiv) in ethyl acetate/ethanol (1:1) was added Pd/C (70 mg, 10%). The flask was first purged with nitrogen, then with hydrogen in a Parr apparatus. The reaction mixture was stirred at ambient temperature for 12 hr at 50 psi. Upon completion by LCMS, the reaction mixture was diluted with ethyl acetate, filtered through Celite and concentrated in vacuo. The crude product was purified by preparative HPLC (acetonitrile/water, 0.1% trifluoroacetic acid) to afford 2-{6-[2-(4-fluoro-phenyl)-ethyl]-pyrazin-2-yl}-4-methyl-thiazole-5-carboxylic acid 4-fluoro-benzylamide (113 mg, 75%). 1H NMR (400 MHz, CD2Cl2) δ 9.15 (s, 1H), 8.36 (s, 1H), 7.33-7.37 (m, 2H), 7.13-7.16 (m, 2H), 7.03-7.08 (m, 2H), 6.92-6.96 (m, 2H), 6.20 (bs, 1H), 4.56 (d, J=4.0 Hz, 2H), 3.08-3.14 (m, 4H), 2.72 (s, 3H); HRMS (M+H)+=451.15.

Workup

  1. customThe flask was first purged with nitrogen
  2. additionUpon completion by LCMS, the reaction mixture was diluted with ethyl acetate
  3. filtrationfiltered through Celite
  4. concentrationconcentrated in vacuo
  5. customThe crude product was purified by preparative HPLC (acetonitrile/water, 0.1% trifluoroacetic acid)

Sources & evidence

ORD record
ord-e0587eb4fa0f4d7ca8d5e50ccc32798f
Source dataset
uspto-grants-2012_11
Patent number
US08314138B2

Reaction notes

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