2-Aminothiazole → HCID 12050062, compound

HRID 1935193Notes

Reaction equation

HRID 1935193 reaction equation
[C:1]1([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[CH:6]=[CH:5][C:4]([C@@H:7]([CH2:11][CH:12]2[CH2:16][CH2:15][CH2:14][CH2:13]2)[C:8](O)=[O:9])=[CH:3][CH:2]=1.F[P-](F)(F)(F)(F)F.N1(OC(N(C)C)=[N+](C)C)C2C=CC=CC=2N=N1.C(N(CC)C(C)C)(C)C.[NH2:56][C:57]1[S:58][CH:59]=[CH:60][N:61]=1>CN(C)C=O>[C:1]1([C:17]2[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=2)[CH:6]=[CH:5][C:4]([C@@H:7]([CH2:11][CH:12]2[CH2:13][CH2:14][CH2:15][CH2:16]2)[C:8]([NH:56][C:57]2[S:58][CH:59]=[CH:60][N:61]=2)=[O:9])=[CH:3][CH:2]=1

Participants

6

Reactant 4

HCID 21552-AminothiazoleHCID 81531DiisopropylethylamineHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 18739625HCID 18739625, compound

Product 1

HCID 12050062HCID 12050062, compoundYield 62%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 2(R)-biphenyl-4-yl-3-cyclopentylpropionic acid (36.9 mg, 0.13 mmol), O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (52.3 mg, 0.14 mmol), N,N-diisopropylethylamine (66 μL, 0.38 mmol), and 2-aminothiazole (25.1 mg, 0.25 mmol) in dry N,N-dimethylformamide (627 μL) was stirred at 25° C. under nitrogen for 13 h. The reaction mixture was concentrated in vacuo to remove the N,N-dimethylformamide. The resulting residue was diluted with ethyl acetate (100 mL). The organic layer was washed with a 10% aqueous hydrochloric acid solution (1×100 mL), a saturated aqueous sodium bicarbonate solution (1×100 mL), and a saturated aqueous sodium chloride solution (1×100 mL). The organic layer was dried over sodium sulfate, filtered, and concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 70-230 mesh, 3/1 hexanes/ethyl acetate) afforded (2R)-2-biphenyl-4-yl-3-cyclopentyl-N-thiazol-2-yl-propionamide (29.4 mg, 62%) as a white foam: mp 132-134° C.; FAB-HRMS m/e calcd for C23H24N2OS (M+H)+ 377.1687, found 377.1696.

Workup

  1. concentrationThe reaction mixture was concentrated in vacuo
  2. customto remove the N,N-dimethylformamide
  3. additionThe resulting residue was diluted with ethyl acetate (100 mL)
  4. washThe organic layer was washed with a 10% aqueous hydrochloric acid solution (1×100 mL)
  5. dry with materialThe organic layer was dried over sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-58e2a16a0bbf4e418cab1f9f64b876cd
Source dataset
uspto-grants-2002_05
Patent number
US06384220B2

Reaction notes

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