Potassium Phosphate, Tribasic → HCID 45254701, compound

HRID 335803Notes

Reaction equation

HRID 335803 reaction equation
Cl[C:2]1[N:7]=[CH:6][C:5]2[O:8][C:9]3[C:14]([C@@:15]4([CH2:19][O:18][C:17]([NH2:20])=[N:16]4)[C:4]=2[CH:3]=1)=[CH:13][C:12]([C:21]1[C:22]([F:28])=[N:23][CH:24]=[C:25]([CH3:27])[CH:26]=1)=[CH:11][CH:10]=3.P([O-])([O-])([O-])=O.[K+].[K+].[K+].[O:37]1[CH2:42][CH:41]=[C:40](B2OC(C)(C)C(C)(C)O2)[CH2:39][CH2:38]1>O1CCOCC1.O.CCOC(C)=O.C([O-])([O-])=O.[Na+].[Na+].CC(P(C(C)(C)C)C1C=CC(N(C)C)=CC=1)(C)C.CC(P(C(C)(C)C)C1C=CC(N(C)C)=CC=1)(C)C.Cl[Pd]Cl>[O:37]1[CH2:38][CH:39]=[C:40]([C:2]2[N:7]=[CH:6][C:5]3[O:8][C:9]4[C:14]([C@@:15]5([CH2:19][O:18][C:17]([NH2:20])=[N:16]5)[C:4]=3[CH:3]=2)=[CH:13][C:12]([C:21]2[C:22]([F:28])=[N:23][CH:24]=[C:25]([CH3:27])[CH:26]=2)=[CH:11][CH:10]=4)[CH2:41][CH2:42]1

Participants

9

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 112180533,6-Dihydro-2H-pyran-4-boronic acid pinacol esterHCID 86640734HCID 86640734, compound

Product 1

HCID 45254701HCID 45254701, compound

Reagents, catalysts & solvents 5

HCID 11714597Bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II)CatalystHCID 962WaterSolventHCID 8857Ethyl AcetateSolventHCID 10340Sodium CarbonateSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
120 °C

Procedure

A glass microwave reaction vessel was charged with (S)-3-chloro-7-(2-fluoro-5-methylpyridin-3-yl)-5′H-spiro[chromeno[2,3-c]pyridine-5,4′-oxazol]-2′-amine (0.100 g, 0.252 mmol), potassium phosphate (0.160 g, 0.756 mmol), 2-(3,6-dihydro-2H-pyran-4-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.106 g, 0.504 mmol) and Bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium (II) (8.92 mg, 0.013 mmol) in dioxane (1.2 mL) and water (0.40 mL). The reaction mixture was stirred and heated in microwave at 120° C. for 30 minutes before being diluted with EtOAc and saturated Na2CO3. The organic layer was washed twice with saturated Na2CO3, dried over Na2SO4 and concentrated in vacuo. The crude was purified by silica gel chromatography (2-10% MeOH—CH2Cl2), followed by preparative HPLC (15-60% CH3CN (with 0.1% TFA)-water (with 0.1% TFA) in 20 min) to provide (S)-3-(3,6-dihydro-2H-pyran-4-yl)-7-(2-fluoro-5-methylpyridin-3-yl)-5′H-spiro[chromeno[2,3-c]pyridine-5,4′-oxazol]-2′-amine as a white solid (MS: MH+=445).

Workup

  1. customA glass microwave reaction vessel
  2. washThe organic layer was washed twice with saturated Na2CO3
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated in vacuo
  5. customThe crude was purified by silica gel chromatography (2-10% MeOH—CH2Cl2)
  6. customfollowed by preparative HPLC (15-60% CH3CN (with 0.1% TFA)-water (with 0.1% TFA) in 20 min)

Sources & evidence

ORD record
ord-3a20859083ec4352a5af0bafd4123ce7
Source dataset
uspto-grants-2014_11
Patent number
US08883782B2

Reaction notes

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