3-(1-Ethyl-4,4,6-trimethyl-2-oxo-1,2,3,4-tetrahydro-quinolin-7-yl)-4-(2,2,2-trifluoro-ethoxy)-benzaldehyde → 1-ethyl-4,4,6-trimethyl-7-[2-(2,2,2-trifluoro-ethoxy)-5-vinyl-phenyl]-3,4-dihydro-1H-quinolin-2-one

HRID 1869555Notes

Reaction equation

HRID 1869555 reaction equation
[CH2:1]([Li])CCC.[CH2:6]([N:8]1[C:17]2[C:12](=[CH:13][C:14]([CH3:32])=[C:15]([C:18]3[CH:19]=[C:20]([CH:23]=[CH:24][C:25]=3[O:26][CH2:27][C:28]([F:31])([F:30])[F:29])[CH:21]=O)[CH:16]=2)[C:11]([CH3:34])([CH3:33])[CH2:10][C:9]1=[O:35])[CH3:7]>[Br-].C[P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C1COCC1>[CH2:6]([N:8]1[C:17]2[C:12](=[CH:13][C:14]([CH3:32])=[C:15]([C:18]3[CH:19]=[C:20]([CH:21]=[CH2:1])[CH:23]=[CH:24][C:25]=3[O:26][CH2:27][C:28]([F:30])([F:31])[F:29])[CH:16]=2)[C:11]([CH3:34])([CH3:33])[CH2:10][C:9]1=[O:35])[CH3:7]

Participants

5

Reactant 2

HCID 579862973-(1-Ethyl-4,4,6-trimethyl-2-oxo-1,2,3,4-tetrahydro-quinolin-7-yl)-4-(2,2,2-trifluoro-ethoxy)-benzaldehydeHCID 178418339Butyllithium

Product 1

HCID 579863101-ethyl-4,4,6-trimethyl-7-[2-(2,2,2-trifluoro-ethoxy)-5-vinyl-phenyl]-3,4-dihydro-1H-quinolin-2-oneYield 94%

Reagents, catalysts & solvents 2

HCID 74505Methyltriphenyliphosphonium bromideCatalystHCID 8028TetrahydrofuranSolvent2×

Conditions

Temperature
-10 °C

Procedure

In accordance with Scheme 16, to a suspension of methyltriphenylphosphonium bromide (3.27 mmol, 1.17 g) in 7.5 mL THF was added a solution of n-butyllithium in hexanes (1.6 M, 3.27 mmol, 2.04 mL) at −40° C. The reaction was warmed to −10° C. and stirred for 30 min. The reaction mixture was cooled to −60° C. and then Compound 1D (0.14 mmol, 0.06 g), in 7.5 mL THF, was added dropwise. The yellow suspension was allowed to stir at r.t. overnight and then quenched by adding 1 mL H2O. It was extracted with EtOAc and was washed with brine. The organic layer was separated, dried over Na2SO4, filtered and the solvent was removed in vacuo. The yellow oil thus obtained was then purified by column chromatography (3.5:1 hexanes/EtOAc) to obtain 1-ethyl-4,4,6-trimethyl-7-[2-(2,2,2-trifluoro-ethoxy)-5-vinyl-phenyl]-3,4-dihydro-1H-quinolin-2-one as a colorless thick gum (0.61 g, 94% yield).

Workup

  1. temperatureThe reaction mixture was cooled to −60° C.
  2. stirringto stir at r.t. overnight
  3. customquenched
  4. additionby adding 1 mL H2O
  5. extractionIt was extracted with EtOAc
  6. washwas washed with brine
  7. customThe organic layer was separated
  8. dry with materialdried over Na2SO4
  9. filtrationfiltered
  10. customthe solvent was removed in vacuo
  11. customThe yellow oil thus obtained
  12. customwas then purified by column chromatography (3.5:1 hexanes/EtOAc)

Sources & evidence

ORD record
ord-6eb20adead9b41e1b9a3e4ec45244da3
Source dataset
uspto-grants-2009_12
Patent number
US07638533B2

Reaction notes

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