Ethyl Acetate → HCID 58486744, compound

HRID 1036090Notes

Reaction equation

HRID 1036090 reaction equation
Br[C:2]1[C:3]([CH3:11])=[CH:4][C:5]2[S:9][CH:8]=[N:7][C:6]=2[CH:10]=1.[NH2:12][C:13]1[CH:18]=[CH:17][C:16](B2OC(C)(C)C(C)(C)O2)=[CH:15][N:14]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+].CC(=O)OCC>C(#N)C.O1CCOCC1.O>[CH3:11][C:3]1[C:2]([C:16]2[CH:17]=[CH:18][C:13]([NH2:12])=[N:14][CH:15]=2)=[CH:10][C:6]2[N:7]=[CH:8][S:9][C:5]=2[CH:4]=1

Participants

8

Reactant 4

HCID 8857Ethyl AcetateHCID 62657Potassium Phosphate, TribasicHCID 27565555-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amineHCID 21515039HCID 21515039, compound

Product 1

HCID 58486744HCID 58486744, compoundYield 99.2%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6342AcetonitrileSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
85 °C

Procedure

A mixture of 5-bromo-6-methylbenzothiazole (54) (91 mg, 0.4 mmol), 2-aminopyridine-5-boronic acid pinacol ester (11) (132 mg, 1.5 eq), bis(ditertbutyl(4-dimethylaminophenyl)phosphine)dichloropalladium (II) (42 mg, 10% mol) and K3PO4 (128 mg, 0.6 mmol) in 1 ml ACN, 1 ml dioxane, 0.5 ml H2O was bubbled with argon before heated at 85° C. for 1 h. After cooling down to r.t., the reaction mixture was taken up in EA, washed with aq. NaHCO3 and brine. Org. phase was dried over Na2SO4, concentrated and then subjected to silica gel flash column chromatography (0-100% B, A: hexane; B: EA) to give 5-(6-methylbenzothiazol-5-yl)-2-pyridylamine (55) (95.8 mg, yield: 99%, purity>90%) as yellow solid.

Workup

  1. customwas bubbled with argon
  2. temperatureAfter cooling down to r.t.
  3. washwashed with aq. NaHCO3 and brine
  4. dry with materialphase was dried over Na2SO4
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-eca4287f98fe42858341652b14a1e4c1
Source dataset
uspto-grants-2013_10
Patent number
US08546403B2

Reaction notes

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