Tetrahydrofuran → (+)-(4aR)-(10bR)-4-methyl-8-(2,3-difluorophenyl)-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-one

HRID 1079123Notes

Reaction equation

HRID 1079123 reaction equation
[CH3:1][N:2]1[C@H:11]2[C@@:6]([CH3:17])([C:7]3[CH:15]=[CH:14][C:13](Br)=[CH:12][C:8]=3[CH2:9][CH2:10]2)[CH2:5][CH2:4][C:3]1=[O:18].[F:19][C:20]1[C:25]([F:26])=[CH:24][CH:23]=[CH:22][C:21]=1B(O)O.C(=O)([O-])[O-].[Na+].[Na+].C1COCC1>C(Cl)(Cl)Cl.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Pd]>[CH3:1][N:2]1[C@H:11]2[C@@:6]([CH3:17])([C:7]3[CH:15]=[CH:14][C:13]([C:24]4[CH:23]=[CH:22][CH:21]=[C:20]([F:19])[C:25]=4[F:26])=[CH:12][C:8]=3[CH2:9][CH2:10]2)[CH2:5][CH2:4][C:3]1=[O:18]

Participants

8

Reactant 4

HCID 8028TetrahydrofuranHCID 10340Sodium CarbonateHCID 2734333(2,3-Difluorophenyl)boronic acidHCID 15355317(4aR)-(10bR)-4,10b-dimethyl-8-bromo-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-one

Product 1

HCID 54389965(+)-(4aR)-(10bR)-4-methyl-8-(2,3-difluorophenyl)-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-oneYield 50%

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 6212ChloroformSolvent

Procedure

A 15 mL round bottom flask was charged with (+)-(4aR)-(10bR)-4-methyl-8-bromo-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-one (200 mg, 0.65 mmol), tetrakis (triphenylphosphine) palladium (0) (23 mg, 0.02 mmol), 2,3-difluorophenylboronic acid (123 mg, 0.78 mmol), 0.65 mL of 2M sodium carbonate solution and 2 mL of THF, fitted with a reflux condenser, and the stirred mixture was heated at 80°, under nitrogen, for 16 h. Additional palladium reagent was added, and the mixture was heated for an additional 16 h. The mixture was cooled, diluted with chloroform (75 mL) and washed with brine (2×25 mL). The combined organic extracts were dried over sodium sulfate, concentrated, and purified by silica gel chromatography (ethyl acetate eluent) to give 111 mg (50%) of the title compound as a white solid. mp 147°-148°. FDMS: m/e=341 α[D]589 =+70.44 (c=1.08, chloroform).

Workup

  1. customfitted with a reflux condenser
  2. temperaturethe stirred mixture was heated at 80°, under nitrogen, for 16 h
  3. temperaturethe mixture was heated for an additional 16 h
  4. temperatureThe mixture was cooled
  5. washwashed with brine (2×25 mL)
  6. dry with materialThe combined organic extracts were dried over sodium sulfate
  7. concentrationconcentrated
  8. custompurified by silica gel chromatography (ethyl acetate eluent)

Sources & evidence

ORD record
ord-f9cc3c67a6094bd8bd5e450d38190285
Source dataset
uspto-grants-1996_08
Patent number
US05550134

Reaction notes

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