Bicarbonate Ion → (5R,6S,8S)-5-Methyl-6-phenyl-3-[1-(trifluoromethyl)cyclopropyl]-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyridine-8-amine

HRID 340177Notes

Reaction equation

HRID 340177 reaction equation
[CH3:1][C@H:2]1[N:7]2[C:8]([C:11]3([C:14]([F:17])([F:16])[F:15])[CH2:13][CH2:12]3)=[N:9][N:10]=[C:6]2[C@@H:5]([NH:18]C(=O)OC(C)(C)C)[CH2:4][C@H:3]1[C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1.FC(F)(F)C(O)=O.C(=O)(O)[O-]>ClCCl>[CH3:1][C@H:2]1[N:7]2[C:8]([C:11]3([C:14]([F:15])([F:16])[F:17])[CH2:13][CH2:12]3)=[N:9][N:10]=[C:6]2[C@@H:5]([NH2:18])[CH2:4][C@H:3]1[C:26]1[CH:27]=[CH:28][CH:29]=[CH:30][CH:31]=1

Participants

5

Reactant 3

HCID 769Bicarbonate IonHCID 6422Trifluoroacetic acidHCID 86698236tert-butyl {(5R,6S,8S)-5-methyl-6-phenyl-3-[1-(trifluoromethyl)cyclopropyl]-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyridine-8-yl}carbamate

Product 1

HCID 86698235(5R,6S,8S)-5-Methyl-6-phenyl-3-[1-(trifluoromethyl)cyclopropyl]-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyridine-8-amineYield 36.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of crude tert-butyl {(5R,6S,8S)-5-methyl-6-phenyl-3-[1-(trifluoromethyl)cyclopropyl]-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyridine-8-yl}carbamate (136 mg, 0.31 mmol) in dichloromethane (3.1 mL) was added trifluoroacetic acid (721 μL, 9.4 mmol) and the resulting mixture stirred 30 min. Saturated aqueous bicarbonate was added, and the resulting mixture was extracted with ethyl acetate (3×). The combined organic extracts were washed with brine, dried over magnesium sulfate, filtered and concentrated. Purification by reverse chromatography (C-18, 95% water/acetonitrile 25% water/acetonitrile with 0.1% trifluoroacetic acid) gave the title compound (38 mg). MS 337.2 (M+1).

Workup

  1. extractionthe resulting mixture was extracted with ethyl acetate (3×)
  2. washThe combined organic extracts were washed with brine
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification by reverse chromatography (C-18, 95% water/acetonitrile 25% water/acetonitrile with 0.1% trifluoroacetic acid)

Sources & evidence

ORD record
ord-45ede06a0c404cf7ae0c7891213208e3
Source dataset
uspto-grants-2014_11
Patent number
US08895572B2

Reaction notes

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