Triethylamine → HCID 54351659, compound

HRID 52274Notes

Reaction equation

HRID 52274 reaction equation
[CH:1]1([N:5]([C@@H:9]2[CH2:14][C:13]3[C:15](OS(C(F)(F)F)(=O)=O)=[CH:16][CH:17]=[C:18]([F:19])[C:12]=3[O:11][CH2:10]2)[CH2:6][CH2:7][CH3:8])[CH2:4][CH2:3][CH2:2]1.[C]=O.C1(P(C2C=CC=CC=2)CCCP(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(N(CC)CC)C.CN([CH:69]=[O:70])C.[CH3:71][OH:72]>C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH:1]1([N:5]([C@@H:9]2[CH2:14][C:13]3=[C:15]([C:71]([O:70][CH3:69])=[O:72])[CH:16]=[CH:17][C:18]([F:19])=[C:12]3[O:11][CH2:10]2)[CH2:6][CH2:7][CH3:8])[CH2:4][CH2:3][CH2:2]1

Participants

7

Reactant 5

HCID 8471TriethylamineHCID 812191,3-Bis(diphenylphosphino)propaneHCID 21901440N,N-dimethylformamide methanolHCID 22871219(R)-3-(N-Cyclobutyl-N-n-propylamino)-8-fluoro-5-trifluoromethylsulfonyloxy-3,4-dihydro-2H-1-benzopyranHCID 178418416HCID 178418416, compound

Product 1

HCID 54351659HCID 54351659, compoundYield 94%

Reagents, catalysts & solvents 1

HCID 167845palladium(II) acetateCatalyst

Conditions

Temperature
70 °C

Procedure

(R)-3-(N-Cyclobutyl-N-n-propylamino)-8-fluoro-5-trifluoromethylsulfonyloxy-3,4-dihydro-2H-1-benzopyran (1.00 g, 2.43 mmol) was dissolved in a solution of DMF/methanol (6:2, 20 mL) and then degassed followed by the inlet of carbonmonoxide (×3). With a slight positive pressure of carbonmonoxide, palladium(II)-acetate (18 mg), 1,3-bis(diphenylphosphino)propane (25 mg) and triethylamine (0.75 mL, 5.3 mmol) were added and the reaction mixture was degassed and subjected to carbonmonoxide once again. The reaction was heated to 70° C. under carbonmonoxide atmosphere with vigorous stirring for 6 h. The reaction was allowed to cool and the solvent was removed in vacuo. The remains were taken into a 2M solution of NH3 and then extracted, twice, with diethyl ether. The combined ether portions were dried (MgSO4), filtered, and the solvent removed in vacuo to give the crude residue. Chromatography on silica (eluent: 15% ethyl acetate/hexane) gave 0.73 mg (94% yield) of the title compound as a clear oil. [α]21D =-130.1° (C=0.1; CHCl3) GC-MS (70 eV) M=321 (2%).

Workup

  1. customdegassed
  2. customthe reaction mixture was degassed
  3. temperatureto cool
  4. customthe solvent was removed in vacuo
  5. extractionextracted
  6. dry with materialThe combined ether portions were dried (MgSO4)
  7. filtrationfiltered
  8. customthe solvent removed in vacuo
  9. customto give the crude residue

Sources & evidence

ORD record
ord-09a6fff5fd2c4a718b57e034f1c85fa0
Source dataset
uspto-grants-1997_04
Patent number
US05616610

Reaction notes

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