Sulfamic Acid → 2-[1-(1-benzhydryl-azetidin-3-yl)-6-fluoro-1H-indazol-3-yl]-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid

HRID 246079Notes

Reaction equation

HRID 246079 reaction equation
[CH:1]([N:14]1[CH2:17][CH:16]([N:18]2[C:26]3[C:21](=[CH:22][CH:23]=[C:24]([F:27])[CH:25]=3)[C:20]([C:28]3[N:29]=[C:30]4[C:36]([CH:37]=[O:38])=[CH:35][N:34]([CH2:39][O:40][CH2:41][CH2:42][Si:43]([CH3:46])([CH3:45])[CH3:44])[C:31]4=[N:32][CH:33]=3)=[N:19]2)[CH2:15]1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.S(=O)(=O)([OH:49])N.[O-]Cl=O.[Na+].OP([O-])(O)=O.[K+]>O1CCOCC1.O>[CH:1]([N:14]1[CH2:17][CH:16]([N:18]2[C:26]3[C:21](=[CH:22][CH:23]=[C:24]([F:27])[CH:25]=3)[C:20]([C:28]3[N:29]=[C:30]4[C:36]([C:37]([OH:49])=[O:38])=[CH:35][N:34]([CH2:39][O:40][CH2:41][CH2:42][Si:43]([CH3:46])([CH3:45])[CH3:44])[C:31]4=[N:32][CH:33]=3)=[N:19]2)[CH2:15]1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

7

Reactant 4

HCID 5987Sulfamic AcidHCID 516951Monobasic potassium phosphateHCID 23668197Sodium ChloriteHCID 866779452-[1-(1-benzhydryl-azetidin-3-yl)-6-fluoro-1H-indazol-3-yl]-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde

Product 1

HCID 712798582-[1-(1-benzhydryl-azetidin-3-yl)-6-fluoro-1H-indazol-3-yl]-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acidYield 26%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent3×HCID 312751,4-DioxaneSolvent

Procedure

To a solution of 2-[1-(1-benzhydryl-azetidin-3-yl)-6-fluoro-1H-indazol-3-yl]-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde (170 mg, 0.27 mmol) in 1,4-dioxane (10 mL) and water (2 mL) at 0° C. was added sulfamic acid (157 mg, 1.61 mmol). Then added a solution of NaClO2 (43 mg, 0.37 mmol) and KH2PO4 (439 mg, 3.22 mmol) in water (4 mL) dropwise over 5 min. The ice bath was removed and the yellow cloudy reaction mixture was stirred at room temperature overnight. The mixture was diluted with water and extracted with EtOAc (2×). The combined organic layers were dried over MgSO4 and concentrated. The residue was triturated with petroleum ether to isolate 45 mg (26%) of 2-[1-(1-benzhydryl-azetidin-3-yl)-6-fluoro-1H-indazol-3-yl]-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid as a light yellow solid.

Workup

  1. customThe ice bath was removed
  2. customthe yellow cloudy reaction mixture
  3. extractionextracted with EtOAc (2×)
  4. dry with materialThe combined organic layers were dried over MgSO4
  5. concentrationconcentrated
  6. customThe residue was triturated with petroleum ether

Sources & evidence

ORD record
ord-e44e6484111a46879d16b16a10f5ff4b
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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