2-Aminothiazole → HCID 22467899, compound

HRID 1935212Notes

Reaction equation

HRID 1935212 reaction equation
C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.BrN1C(=O)CCC1=O.[CH:28]1([CH2:33][CH:34]([C:38]2[CH:43]=[CH:42][C:41]([C:44]3[CH:49]=[CH:48][N:47]=[CH:46][CH:45]=3)=[CH:40][CH:39]=2)[C:35](O)=[O:36])[CH2:32][CH2:31][CH2:30][CH2:29]1.[NH2:50][C:51]1[S:52][CH:53]=[CH:54][N:55]=1>C(Cl)Cl>[CH:28]1([CH2:33][CH:34]([C:38]2[CH:43]=[CH:42][C:41]([C:44]3[CH:49]=[CH:48][N:47]=[CH:46][CH:45]=3)=[CH:40][CH:39]=2)[C:35]([NH:50][C:51]2[S:52][CH:53]=[CH:54][N:55]=2)=[O:36])[CH2:32][CH2:31][CH2:30][CH2:29]1

Participants

6

Reactant 4

HCID 21552-AminothiazoleHCID 11776TriphenylphosphineHCID 67184N-bromobutanimideHCID 22467912HCID 22467912, compound

Product 1

HCID 22467899HCID 22467899, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

A solution of triphenylphosphine (59 mg, 0.22 mmol) in methylene chloride (1 mL) was cooled to 0° C. and then slowly treated with N-bromosuccinimide (39 mg, 0.22 mmol). The reaction mixture was stirred at 0° C. for 20 min and then treated with 3-cyclopentyl-2-(4-pyridin-4-yl-phenyl)-propionic acid (55 mg, 0.19 mmol). The resulting reaction mixture was stirred at 0° C. for 10 min and then allowed to warm to 25° C. where it was stirred for 20 min. The reaction mixture was then treated with 2-aminothiazole (41 mg, 0.41 mmol). The resulting reaction mixture was stirred at 25° C. for 15 h. The crude reaction mixture was then directly purified by flash chromatography (Merck Silica gel 60, 230-400 mesh, 20/1 methylene chloride/methanol) to afford impure 3-cyclopentyl-2-(4-pyridin-4-yl-phenyl)-N-thiazol-2-yl-propionamide as an orange foam. The impure foam was treated with a solution of hexanes/ethyl acetate (5 mL, 1:3), and a precipitate formed. The reaction mixture was placed in the freezer for 15 h, and the solid was collected by filtration to afford 3-cyclopentyl-2-(4-pyridin-4-yl-phenyl)-N-thiazol-2-yl-propionamide (26 mg, 37%) as a pale orange solid: mp 213-215° C.; EI-HRMS m/e calcd for C22H23N3OS (M+) 377.1562, found 377.1564.

Workup

  1. customThe resulting reaction mixture
  2. stirringwas stirred at 0° C. for 10 min
  3. temperatureto warm to 25° C. where it
  4. stirringwas stirred for 20 min
  5. customThe resulting reaction mixture
  6. stirringwas stirred at 25° C. for 15 h
  7. customThe crude reaction mixture
  8. customwas then directly purified by flash chromatography (Merck Silica gel 60, 230-400 mesh, 20/1 methylene chloride/methanol)

Sources & evidence

ORD record
ord-2e932c25ace444c7b998742fbdebad7e
Source dataset
uspto-grants-2002_05
Patent number
US06384220B2

Reaction notes

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