HCID 59278441, compound → HCID 59278513, compound

HRID 1361200Notes

Reaction equation

HRID 1361200 reaction equation
[CH3:1][O:2][C:3](=[O:51])[C@@H:4]([NH:26][C:27](=O)[CH:28]([NH:31][C:32]([C:34]1[C:35]2[CH:42]=[N:41][N:40]([C:43]3[CH:48]=[CH:47][C:46]([F:49])=[CH:45][CH:44]=3)[C:36]=2[CH:37]=[N:38][CH:39]=1)=[O:33])[CH2:29][CH3:30])[CH2:5][S:6]C(C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>C(Cl)Cl.Cl[Ti](Cl)(Cl)Cl>[CH3:1][O:2][C:3]([C@@H:4]1[CH2:5][S:6][C:27]([CH:28]([NH:31][C:32]([C:34]2[C:35]3[CH:42]=[N:41][N:40]([C:43]4[CH:44]=[CH:45][C:46]([F:49])=[CH:47][CH:48]=4)[C:36]=3[CH:37]=[N:38][CH:39]=2)=[O:33])[CH2:29][CH3:30])=[N:26]1)=[O:51]

Participants

4

Reactant 1

HCID 59278441HCID 59278441, compound

Product 1

HCID 59278513HCID 59278513, compound

Reagents, catalysts & solvents 2

HCID 24193Titanium TetrachlorideCatalystHCID 6344DichloromethaneSolvent2×

Procedure

To a solution of (R)-2-(2-{[1-(4-fluorophenyl)-1H-pyrazolo[3,4-c]pyridine-4-carbonyl]-amino}-butyrylamino)-3-tritylsulfanyl-propionic acid methyl ester (0.560 g, 0.798 mmol) in CH2Cl2 (24.0 mL) was added a 1 M solution of TiCl4 (2.40 mL, 2.40 mmol) in CH2Cl2. After 2 hours, the resulting mixture was quenched with saturated aqueous sodium bicarbonate (10 mL). The aqueous layer was separated and extracted with CH2Cl2 (2×10 mL). The combined organic layers were washed with brine (10 mL), dried over MgSO4, filtered and concentrated. The mixture was purified by silica gel chromatography eluting with a gradient of 0-80% ethyl acetate in heptane to afford (R)-2-(1-{[1-(4-fluorophenyl)-1H-pyrazolo[3,4-c]pyridine-4-carbonyl]-amino}-propyl)-4,5-dihydro-thiazole-4-carboxylic acid methyl ester.

Workup

  1. customthe resulting mixture was quenched with saturated aqueous sodium bicarbonate (10 mL)
  2. customThe aqueous layer was separated
  3. extractionextracted with CH2Cl2 (2×10 mL)
  4. washThe combined organic layers were washed with brine (10 mL)
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe mixture was purified by silica gel chromatography
  9. washeluting with a gradient of 0-80% ethyl acetate in heptane

Sources & evidence

ORD record
ord-b4effe2d6e774e3584d2f8ebd5214ffa
Source dataset
uspto-grants-2011_02
Patent number
US07879873B2

Reaction notes

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