Potassium Phosphate, Tribasic → HCID 58135541, compound

HRID 1507123Notes

Reaction equation

HRID 1507123 reaction equation
I[C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[N:7]([CH:11]1[CH2:16][CH2:15][CH2:14][CH2:13][O:12]1)[N:6]=[C:5]2[CH:17]=[O:18].[N:19]1[CH:24]=[CH:23][CH:22]=[C:21](B(O)O)[CH:20]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>O1CCOCC1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[N:19]1[CH:24]=[CH:23][CH:22]=[C:21]([C:2]2[CH:3]=[C:4]3[C:8](=[CH:9][CH:10]=2)[N:7]([CH:11]2[CH2:16][CH2:15][CH2:14][CH2:13][O:12]2)[N:6]=[C:5]3[CH:17]=[O:18])[CH:20]=1

Participants

7

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 27343783-Pyridinylboronic acidHCID 205807365-iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-3-carbaldehyde

Product 1

HCID 58135541HCID 58135541, compoundYield 47%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
95 °C

Procedure

5-Iodo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-3-carbaldehyde (CXIV) (1.53 g, 4.30 mmol), pyridine-3-boronic acid (CXXXI) (0.58 g, 4.73 mmol), and potassium phosphate tribasic (1.37 g, 6.45 mmol) was dissolved in 1,4-dioxane (43.0 mL) and water (9.0 mL). Tetrakis(triphenylphosphine)palladium(0) (0.50 g, 0.4301 mmol) was added, and the reaction was heated to 95° C. for 2.5 h. The solvent was removed, and the residue was partitioned between EtOAc and water. The organic phase was separated and washed sequentially with water and brine. The material was dried (MgSO4), concentrated, and purified by flash chromatography using a 40 g Thomson normal phase silica gel cartridge (100% hexanes→1:1 EtOAc:hexanes) to afford 5-(pyridin-3-yl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-3-carbaldehyde (CXXXII) (0.62 g, 2.02 mmol, 47% yield) as a tan amorphous solid. 1H NMR (DMSO-d6) δ ppm 10.23 (s, 1H), 8.95 (d, J=2.3 Hz, 1H), 8.61 (dd, J=4.8, 1.5 Hz, 1H), 8.39 (d, J=0.98 Hz, 1H), 8.17-8.14 (m, 1H), 8.06 (d, J=8.8 Hz, 1H), 7.95-7.93 (m, 1H), 7.64-7.60 (m, 1H), 6.13 (dd, J=9.4, 2.4 Hz, 1H), 3.93-3.90 (m, 1H), 3.86-3.81 (m, 1H), 2.45-2.41 (m, 1H), 2.11-2.07 (m, 2H), 1.82-1.78 (m, 1H), 1.66-1.62 (m, 2H); ESIMS found for C13H17N3O2 m/z 308 (M+H).

Workup

  1. customThe solvent was removed
  2. customthe residue was partitioned between EtOAc and water
  3. customThe organic phase was separated
  4. washwashed sequentially with water and brine
  5. dry with materialThe material was dried (MgSO4)
  6. concentrationconcentrated
  7. custompurified by flash chromatography

Sources & evidence

ORD record
ord-ef2e1d34ca554594835f6c7bbbdbcb31
Source dataset
uspto-grants-2015_12
Patent number
US09221793B2

Reaction notes

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