Toluene → 4-{(S)-4-Carboxy-2-[(5-ethoxycarbonylmethoxy-1-phenyl-1H-pyrazole-3-carbonyl)-amino]-butyryl}-piperazine-1-carboxylic acid ethyl ester

HRID 1908601Notes

Reaction equation

HRID 1908601 reaction equation
[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:44])[C@@H:13]([NH:23][C:24]([C:26]2[CH:30]=[C:29]([O:31][CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34])[N:28]([C:38]3[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=3)[N:27]=2)=[O:25])[CH2:14][CH2:15][C:16]([O:18]C(C)(C)C)=[O:17])[CH2:8][CH2:7]1)=[O:5])[CH3:2].C1(C)C=CC=CC=1>C(Cl)Cl.C(O)(C(F)(F)F)=O>[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:44])[C@@H:13]([NH:23][C:24]([C:26]2[CH:30]=[C:29]([O:31][CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34])[N:28]([C:38]3[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=3)[N:27]=2)=[O:25])[CH2:14][CH2:15][C:16]([OH:18])=[O:17])[CH2:8][CH2:7]1)=[O:5])[CH3:2]

Participants

5

Reactant 2

HCID 1140TolueneHCID 669200094-{(S)-4-tert-Butoxycarbonyl-2-[(5-ethoxycarbonylmethoxy-1-phenyl-1H-pyrazole-3-carbonyl)-amino]-butyryl}-piperazine-1-carboxylic acid ethyl ester

Product 1

HCID 441259954-{(S)-4-Carboxy-2-[(5-ethoxycarbonylmethoxy-1-phenyl-1H-pyrazole-3-carbonyl)-amino]-butyryl}-piperazine-1-carboxylic acid ethyl ester

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 6422Trifluoroacetic acidSolvent

Procedure

To a solution of 73 mg of 4-{(S)-4-tert-Butoxycarbonyl-2-[(5-ethoxycarbonylmethoxy-1-phenyl-1H-pyrazole-3-carbonyl)-amino]-butyryl}-piperazine-1-carboxylic acid ethyl ester in 1 ml of DCM, 0.2 ml of TFA was added at RT. After 4 h 20 ml of toluene was added and the solvents were removed under reduced pressure. The residue was purified by preparative HPLC (C18 reverse phase column, elution with a water/MeCN gradient with 0.1% TFA). The fractions containing the product were evaporated and lyophilized to yield a white solid.

Workup

  1. customthe solvents were removed under reduced pressure
  2. customThe residue was purified by preparative HPLC (
  3. washC18 reverse phase column, elution with a water/MeCN gradient with 0.1% TFA)
  4. additionThe fractions containing the product
  5. customwere evaporated
  6. customto yield a white solid

Sources & evidence

ORD record
ord-d9b59ebc093a4d208b58d9b0496ef1b6
Source dataset
uspto-grants-2013_12
Patent number
US08598179B2

Reaction notes

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