Cesium carbonate → 4-(1-(tert-butyldimethylsilyloxy)cyclopropyl)-N-(diphenylmethylene)-3-fluoroaniline

HRID 1842907Notes

Reaction equation

Br[C:2]1[CH:7]=[CH:6][C:5]([C:8]2([O:11][Si:12]([C:15]([CH3:18])([CH3:17])[CH3:16])([CH3:14])[CH3:13])[CH2:10][CH2:9]2)=[C:4]([F:19])[CH:3]=1.[C:20](=[NH:33])([C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1.C([O-])([O-])=O.[Cs+].[Cs+]>C1(C)C=CC=CC=1.CCOC(C)=O.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].C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1>[Si:12]([O:11][C:8]1([C:5]2[CH:6]=[CH:7][C:2]([N:33]=[C:20]([C:21]3[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=3)[C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=3)=[CH:3][C:4]=2[F:19])[CH2:10][CH2:9]1)([C:15]([CH3:18])([CH3:17])[CH3:16])([CH3:14])[CH3:13]

Participants

Conditions

Temperature: 100 °C

Procedure

To a degassed suspension of (1-(4-bromo-2-fluorophenyl)cyclopropoxy)(tert-butyl)dimethylsilane (4.0 g, 11.59 mmol, 1.0 eq) in toluene (50 mL), was added BINAP (0.261 g, 0.347 mmol, 0.03 eq), benzophenone imine (2.1 g, 11.59 mmol, 1.0 eq) followed by Cs2CO3 (5.64 g, 17.38 mmol, 1.5 eq) in a sealed tube, then was added Pd2(dba)3 (0.138 g, 0.15 mmol, 0.013 eq) and the mixture heated to 100° C. for 8 h. The reaction mixture was diluted with EtOAc (120 mL), washed with water (25 mL×2), brine (25 mL) and dried over Na2SO4 and the solvent was evaporated under vacuum to get 4-(1-(tert-butyldimethylsilyloxy)cyclopropyl)-N-(diphenylmethylene)-3-fluoroaniline (4.8 g) crude product as a yellow oil (TLC system: EtOAc/PE (1:49), Rf: 0.75).

Workup

washwashed with water (25 mL×2), brine (25 mL)
dry with materialdried over Na2SO4
customthe solvent was evaporated under vacuum

Sources & evidence

ORD record: ord-a64b09dae5374eaa85f811ef580c3ca8
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08946204B2

Reaction notes

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