Benzophenone imine → Benzhydrylidene-[4-(tert-butyldimethylsilyloxymethyl)-3-fluoropyridin-2-yl]-amine

HRID 599858Notes

Reaction equation

HRID 599858 reaction equation
[Si:1]([O:8][CH2:9][C:10]1[CH:15]=[CH:14][N:13]=[C:12](Cl)[C:11]=1[F:17])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[C:18](=[NH:31])([C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1.C1C=CC(P(C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC=CC=2)C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CC(C)([O-])C.[Na+]>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C(OCC)(=O)C>[C:18](=[N:31][C:12]1[C:11]([F:17])=[C:10]([CH2:9][O:8][Si:1]([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2])[CH:15]=[CH:14][N:13]=1)([C:25]1[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=1)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1

Participants

8

Reactant 4

HCID 136809Benzophenone imineHCID 634876Binap, (A+-)-HCID 23676156Sodium t-butoxideHCID 591391774-(((tert-Butyldimethylsilyl)oxy)methyl)-2-chloro-3-fluoropyridine

Product 1

HCID 59139248Benzhydrylidene-[4-(tert-butyldimethylsilyloxymethyl)-3-fluoropyridin-2-yl]-amineYield 76.4%

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of 4-(tert-butyldimethylsilyloxymethyl)-2-chloro-3-fluoropyridine (30 mg, 108 μmol), benzophenone imine (14 μL, 84 μmol), tris(dibenzylideneacetone)dipalladium(0) (7.7 mg, 8.4 μmol), (S)-(−)-2,2′-bis(diphenylphosphino)-1,1′-binaphtyl (15.7 mg, 25.3 μmol) and sodium tert-butoxide (10.4 mg, 108 μmol) in toluene (0.5 mL) was stirred at 60° C. overnight. Ethyl acetate was then added to the reaction solution, and the solution was washed with sodium hydrogen carbonate solution and saturated saline. The organic layer was dried over anhydrous magnesium sulfate, and the solvent was distilled away under reduced pressure. The resultant residue was purified by silica gel column chromatography to yield the title compound (27 mg, 60%).

Workup

  1. washthe solution was washed with sodium hydrogen carbonate solution and saturated saline
  2. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
  3. distillationthe solvent was distilled away under reduced pressure
  4. customThe resultant residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-c0c6281b8e744fb199ed318717cade29
Source dataset
uspto-grants-2011_03
Patent number
US07897792B2

Reaction notes

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