Tri-tert-butylphosphine tetrafluoroborate → HCID 66649728, compound

HRID 420276Notes

Reaction equation

HRID 420276 reaction equation
[NH2:1][C:2]1[C:31](I)=[CH:30][C:5]([CH2:6][C@H:7]2[C@H:15]3[C@@H:11]([N:12]([CH2:17][C:18]4[CH:23]=[CH:22][CH:21]=[C:20]([C:24]([CH3:27])([CH3:26])[CH3:25])[CH:19]=4)[C:13](=[O:16])[O:14]3)[CH2:10][S:9](=[O:29])(=[O:28])[CH2:8]2)=[CH:4][C:3]=1[F:33].F[B-](F)(F)F.[C:39]([PH+](C(C)(C)C)C(C)(C)C)(C)(C)[CH3:40]>O1CCOCC1.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]>[NH2:1][C:2]1[C:31]([CH:39]=[CH2:40])=[CH:30][C:5]([CH2:6][C@H:7]2[C@H:15]3[C@@H:11]([N:12]([CH2:17][C:18]4[CH:23]=[CH:22][CH:21]=[C:20]([C:24]([CH3:27])([CH3:26])[CH3:25])[CH:19]=4)[C:13](=[O:16])[O:14]3)[CH2:10][S:9](=[O:29])(=[O:28])[CH2:8]2)=[CH:4][C:3]=1[F:33]

Participants

6

Reactant 2

HCID 2734635Tri-tert-butylphosphine tetrafluoroborateHCID 57386048HCID 57386048, compound

Product 1

HCID 66649728HCID 66649728, compound

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 8857Ethyl AcetateSolventHCID 312751,4-DioxaneSolvent2×

Procedure

To a degassed solution of (3aR*,7S*,7aS*)-7-(4-amino-3-fluoro-5-iodo-benzyl)-3-(3-tert-butyl-benzyl)-5,5-dioxo-hexahydro-1-oxa-5lambda*6*-thia-3-aza-inden-2-one (example 1k) (0.60 g, 1 mmol) in anhydrous dioxane (4 mL) was added under argon Cs2CO3 (0.665 g, 2.0 mmol), 2,4,6-trivinyl-cyclotriboroxane pyridine complex (0.365 g, 1.5 mmol) and tri-tert-butyl-phosphonium tetrafluoroborate (0.044 g, 0.15 mmol) in dioxane was added under argon the Pd2(dba)3 (0.028 g, 0.03 mmol) and the reaction mixture was heated at reflux for 2 h. The reaction mixture was diluted with EtOAc and the organic layer was washed with water and brine, dried over MgSO4, filtered and evaporated. The title compound was obtained after flash-chromatography on silica gel (hexane-EtOAc 3:1 to 2:1) and crystallization from CH2Cl2-hexane as white crystals: HPLC RtA=2.22 min; ESIMS [M+NH4]+=504.

Workup

  1. temperaturethe reaction mixture was heated
  2. temperatureat reflux for 2 h
  3. washthe organic layer was washed with water and brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. customevaporated

Sources & evidence

ORD record
ord-a6145a5582714a2a8ba7586e31735904
Source dataset
uspto-grants-2012_01
Patent number
US08093406B2

Reaction notes

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