Diisopropylethylamine → 3-(4-Benzyloxy-phenyl)-2-[4-methyl-2-(piperidine-1-sulfonylamino)-pentanoylamino]-propionic acid tert-butyl ester

HRID 2230321Notes

Reaction equation

HRID 2230321 reaction equation
[C:1]([O:5][C:6](=[O:32])[CH:7]([NH:23][C:24](=[O:31])[CH:25]([NH2:30])[CH2:26][CH:27]([CH3:29])[CH3:28])[CH2:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[CH:11][CH:10]=1)([CH3:4])([CH3:3])[CH3:2].[N:33]1([S:39](Cl)(=[O:41])=[O:40])[CH2:38][CH2:37][CH2:36][CH2:35][CH2:34]1.C(N(CC)C(C)C)(C)C>CN(C1C=CN=CC=1)C.CN(C=O)C.C(OCC)(=O)C.C(Cl)(Cl)Cl.CCCCCC>[C:1]([O:5][C:6](=[O:32])[CH:7]([NH:23][C:24](=[O:31])[CH:25]([NH:30][S:39]([N:33]1[CH2:38][CH2:37][CH2:36][CH2:35][CH2:34]1)(=[O:41])=[O:40])[CH2:26][CH:27]([CH3:28])[CH3:29])[CH2:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[CH:11][CH:10]=1)([CH3:3])([CH3:2])[CH3:4]

Participants

9

Reactant 3

HCID 81531DiisopropylethylamineHCID 11298344Piperidine-1-sulfonyl chlorideHCID 540817292-(2-Amino-4-methyl-pentanoylamino)-3-(4-benzyloxy-phenyl)-propionic acid tert-butyl ester

Product 1

HCID 700590143-(4-Benzyloxy-phenyl)-2-[4-methyl-2-(piperidine-1-sulfonylamino)-pentanoylamino]-propionic acid tert-butyl ester

Reagents, catalysts & solvents 5

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6212ChloroformSolventHCID 6228DimethylformamideSolventHCID 8058HexaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of the product from Example AI ([S-(R*,R*)]-2-(2-amino-4-methyl-pentanoylamino)-3-(4-benzyloxy-phenyl)-propionic acid tert-butyl ester) (220 mg, 0.50 mmol), piperidinesulfonyl chloride (102 mg, 0.55 mmol, prepared by the method of Von Geldern, et al., J. Med. Chem., 1996;39:968-981), N,N-diisopropylethylamine (129 mg, 1.00 mmol), and DMAP (20 mg) in DMF (1 mL) is stirred at room temperature for 48 hours, diluted with ethyl acetate, and washed with water, 1N HCl, saturated NaHCO3 solution and brine, dried over anhydrous sodium sulfate, and concentrated. The remaining oily residue was purified via preparative TLC (50% EtOAc/hexane) giving a clear oil which was dissolved in 0.5 mL CHCl3, and diluted with 5 mL hexane. After 3 days at 3° C., the crystals that had formed were collected, and weighed 34 mg (12%), mp=125-126° C.

Workup

  1. washwashed with water, 1N HCl, saturated NaHCO3 solution and brine
  2. dry with materialdried over anhydrous sodium sulfate
  3. concentrationconcentrated
  4. customThe remaining oily residue was purified via preparative TLC (50% EtOAc/hexane)
  5. customgiving a clear oil which
  6. customthe crystals that had formed
  7. customwere collected

Sources & evidence

ORD record
ord-832e5db892434d47ab16a48717787b2f
Source dataset
uspto-grants-2002_07
Patent number
US06423689B1

Reaction notes

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