Trifluoroacetic acid methylene chloride → (S)-3-methyl-2-{4'-[(benzooxazole-2-carbonyl)-amino]-biphenyl-4-sulfonylamino}-butyric acid

HRID 29435Notes

Reaction equation

HRID 29435 reaction equation
C([O:5][C:6](=[O:39])[C@@H:7]([NH:11][S:12]([C:15]1[CH:20]=[CH:19][C:18]([C:21]2[CH:26]=[CH:25][C:24]([NH:27][C:28]([C:30]3[O:31][C:32]4[CH:38]=[CH:37][CH:36]=[CH:35][C:33]=4[N:34]=3)=[O:29])=[CH:23][CH:22]=2)=[CH:17][CH:16]=1)(=[O:14])=[O:13])[CH:8]([CH3:10])[CH3:9])(C)(C)C.C(O)(C(F)(F)F)=O.C(Cl)Cl>>[CH3:9][CH:8]([CH3:10])[C@H:7]([NH:11][S:12]([C:15]1[CH:16]=[CH:17][C:18]([C:21]2[CH:22]=[CH:23][C:24]([NH:27][C:28]([C:30]3[O:31][C:32]4[CH:38]=[CH:37][CH:36]=[CH:35][C:33]=4[N:34]=3)=[O:29])=[CH:25][CH:26]=2)=[CH:19][CH:20]=1)(=[O:14])=[O:13])[C:6]([OH:39])=[O:5]

Participants

3

Reactant 2

HCID 21863450Trifluoroacetic acid methylene chlorideHCID 68714449(S)-3-methyl-2-{4'-[(benzoxazole-2-carbonyl)-amino]-biphenyl-4-sulfonylamino}-butyric acid tert-butyl ester

Product 1

HCID 11397774(S)-3-methyl-2-{4'-[(benzooxazole-2-carbonyl)-amino]-biphenyl-4-sulfonylamino}-butyric acid

Procedure

To (S)-3-methyl-2-{4′-[(benzoxazole-2-carbonyl)-amino]-biphenyl-4-sulfonylamino}-butyric acid tert-butyl ester was added 4 mL of TFA/CH2Cl2 (1:1). The solution was stirred at room temperature for 3 h. The solvents were removed under vacuum and the residue was triturated with ether. Filtration gave 90 mg of (S)-3-methyl-2-{4′-[(benzooxazole-2-carbonyl)-amino]-biphenyl-4-sulfonylamino}-butyric acid as a white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 0.8 (dd, J=12.6, 6.8 Hz, 6 H) 1.9 (m, 1 H) 3.6 (dd, J=9.3, 6.1 Hz, 1 H) 7.6 (m, 1 H) 7.6 (m, 1 H) 7.8 (m, 6 H) 8.0 (m, 2 H) 8.1 (m, 3 H) 11.4 (s, 1 H).

Workup

  1. customThe solvents were removed under vacuum
  2. customthe residue was triturated with ether
  3. filtrationFiltration

Sources & evidence

ORD record
ord-7b99eb78c031435997878fff3867556b
Source dataset
uspto-grants-2008_09
Patent number
US07420001B2

Reaction notes

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