Pyridine → HCID 12067656, compound

HRID 1280026Notes

Reaction equation

HRID 1280026 reaction equation
C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.BrN1C(=O)CCC1=O.[Cl:28][C:29]1[CH:30]=[C:31]([C@@H:39]([CH2:43][CH:44]2[CH2:48][CH2:47][CH2:46][CH2:45]2)[C:40]([OH:42])=O)[CH:32]=[CH:33][C:34]=1[S:35]([CH3:38])(=[O:37])=[O:36].[NH2:49][C:50]1[O:51][C:52]2[CH:58]=[CH:57][CH:56]=[CH:55][C:53]=2[N:54]=1.N1C=CC=CC=1>C(Cl)Cl.O>[O:51]1[C:52]2[CH:58]=[CH:57][CH:56]=[CH:55][C:53]=2[N:54]=[C:50]1[NH:49][C:40](=[O:42])[C@@H:39]([C:31]1[CH:32]=[CH:33][C:34]([S:35]([CH3:38])(=[O:36])=[O:37])=[C:29]([Cl:28])[CH:30]=1)[CH2:43][CH:44]1[CH2:48][CH2:47][CH2:46][CH2:45]1

Participants

8

Reactant 5

HCID 1049PyridineHCID 11776TriphenylphosphineHCID 207072-AminobenzoxazoleHCID 67184N-bromobutanimideHCID 12067655(R)-2-(3-Chloro-4-(methylsulfonyl)phenyl)-3-cyclopentylpropanoic acid

Product 1

HCID 12067656HCID 12067656, compoundYield 76%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

A solution of triphenylphosphine (238 mg, 0.91 mmol) in methylene chloride (10 mL) was cooled to 0° C. and then treated with N-bromosuccinimide (183 mg, 1.03 mmol). The reaction mixture was stirred at 0° C. until it became homogeneous. The resulting light purple reaction mixture was then treated with 2(R)-(3-chloro-4-methanesulfonyl-phenyl)-3-cyclopentyl-propionic acid (prepared as in Example 19, 200 mg, 0.61 mmol). The reaction mixture was stirred at 0° C. for 20 min and then allowed to warm to 25° C. where it was stirred for 30 min. The reaction mixture was then treated with 2-aminobenzoxazole (121 mg, 0.91 mmol) and pyridine (0.15 mL, 1.8 mmol), and the resulting reaction mixture was stirred at 25° C. for 16 h. The reaction was then diluted with water (15 mL) and extracted with methylene chloride (3×15 mL). The combined organic layers were dried over sodium sulfate, filtered, and concentrated in vacuo. Biotage chromatography (FLASH 40S, Silica, 60/40 hexanes/ethyl acetate) afforded N-benzooxazol-2-yl-2(R)-(3-chloro-4-methanesulfonyl-phenyl)-3-cyclopentyl-propionamide (206 mg, 76%) as a light orange foam: [α]23589=−24.4° (c=0,119,chloroform); EI-HRMS m/e calcd for C22H23ClN2O4S (M+) 446.1067, found 446.1083.

Workup

  1. stirringThe reaction mixture was stirred at 0° C. for 20 min
  2. temperatureto warm to 25° C. where it
  3. stirringwas stirred for 30 min
  4. customthe resulting reaction mixture
  5. stirringwas stirred at 25° C. for 16 h
  6. extractionextracted with methylene chloride (3×15 mL)
  7. dry with materialThe combined organic layers were dried over sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-58a5c8ddf2704299a7dde9d9c8a1e4d6
Source dataset
uspto-grants-2002_09
Patent number
US06448399B1

Reaction notes

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