Potassium Phosphate, Tribasic → (5-Amino-6-methoxypyridin-2-yl)dimethylphosphine oxide

HRID 921325Notes

Reaction equation

HRID 921325 reaction equation
Br[C:2]1[N:7]=[C:6]([O:8][CH3:9])[C:5]([NH2:10])=[CH:4][CH:3]=1.[CH3:11][PH:12](=[O:14])[CH3:13].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2.P([O-])([O-])([O-])=O.[K+].[K+].[K+]>CN(C=O)C.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH3:11][P:12]([C:2]1[N:7]=[C:6]([O:8][CH3:9])[C:5]([NH2:10])=[CH:4][CH:3]=1)([CH3:13])=[O:14]

Participants

7

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 105361376-Bromo-2-methoxypyridin-3-amineHCID 178503022methylphosphonoylmethane

Product 1

HCID 67052694(5-Amino-6-methoxypyridin-2-yl)dimethylphosphine oxideYield 39%

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 6228DimethylformamideSolvent

Procedure

To a solution of 6-bromo-2-methoxypyridin-3-ylamine (0.203 g, 1.00 mmol) in 4 mL DMF was added dimethylphosphine oxide (0.171 g, 1.10 mmol), palladium acetate (11.0 mg, 0.0490 mmol), XANTPHOS (35.0 mg, 0.0600 mmol), and potassium phosphate (0.233 g, 1.10 mmol). The mixture was purged with nitrogen, and subjected to microwaves at 150° C. for 20 minutes. The reaction mixture was concentrated and purified by silica gel chromatography (0-10% 7N ammonia in methanol:dichloromethane) to afford the desired product (77.2 mg, 39% yield).

Workup

  1. customThe mixture was purged with nitrogen
  2. concentrationThe reaction mixture was concentrated
  3. custompurified by silica gel chromatography (0-10% 7N ammonia in methanol:dichloromethane)

Sources & evidence

ORD record
ord-acc78603c87e40bebb6da9731648a2f5
Source dataset
uspto-grants-2016_03
Patent number
US09273077B2

Reaction notes

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