Tert-butyl-3-(4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinoline-6-carbonyl)azetidine-1-carboxylate → tert-Butyl-3-(1-(4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)-1-hydroxyprop-2-yn-1-yl)azetidine-1-carboxylate

HRID 526858Notes

Reaction equation

HRID 526858 reaction equation
[Cl:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([C:12]([CH:14]3[CH2:17][N:16]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:15]3)=[O:13])[CH:10]=2)[N:5]=[C:4]([O:25][CH3:26])[C:3]=1[CH2:27][C:28]1[CH:33]=[CH:32][C:31]([C:34]([F:37])([F:36])[F:35])=[CH:30][CH:29]=1.[C-:38]#[C-:39].[Si]([Li])(C)(C)C>C1COCC1>[C:21]([O:20][C:18]([N:16]1[CH2:17][CH:14]([C:12]([C:9]2[CH:10]=[C:11]3[C:6](=[CH:7][CH:8]=2)[N:5]=[C:4]([O:25][CH3:26])[C:3]([CH2:27][C:28]2[CH:33]=[CH:32][C:31]([C:34]([F:36])([F:35])[F:37])=[CH:30][CH:29]=2)=[C:2]3[Cl:1])([OH:13])[C:38]#[CH:39])[CH2:15]1)=[O:19])([CH3:22])([CH3:24])[CH3:23]

Participants

4

Reactant 2

HCID 86715662Tert-butyl-3-(4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinoline-6-carbonyl)azetidine-1-carboxylate2×HCID 178462447HCID 178462447, compound2×

Product 1

HCID 118006295tert-Butyl-3-(1-(4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)-1-hydroxyprop-2-yn-1-yl)azetidine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

To a flask containing tert-butyl 3-(4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinoline-6-carbonyl)azetidine-1-carboxylate (500 mg, 0.93 mmol, Intermediate 13: step b) was added THF (10 mL) and the solution was cooled to 0° C. Then, TMS-lithiumacetylide (0.5 M in Et2O, 2.0 mL, 1 mmol) was added and the reaction was allowed to warm gradually to room temperature. After 5 hours, additional TMS-lithiumacetylide (2 mL, 1.0 mmol, 0.5 M in Et2O) was added and the reaction mixture was stirred at room temperature overnight. After 24 hours, the mixture was quenched with aqueous NH4Cl solution and extracted with EtOAc (3×30 mL). The combined organics were washed with brine, dried over MgSO4, filtered and concentrated to dryness. Chromatography on silica gel (1% acetone-DCM increasing to 5% acetone) provided a mixture of title compound and the silylated title compound. To a flask containing tert-butyl-3-(1-(4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinolin-6-yl)-1-hydroxy-3-(trimethylsilyl)prop-2-yn-1-yl)azetidine-1-carboxylate (220 mg, 0.35 mmol) was added MeOH (8 mL) followed by 2 M aqueous KOH (0.4 mL) at room temperature. After stirring for 15 minutes, the reaction was concentrated and chromatographed directly on silica gel (5% acetone-DCM increasing to 25% acetone) to provide the title compound as an amorphous white solid. 1H NMR (500 MHz, CDCl3) δ 8.36 (d, J=1.1 Hz, 1H), 7.88-7.79 (m, 2H), 7.50 (d, J=8.2 Hz, 2H), 7.38 (d, J=8.1 Hz, 2H), 4.35 (s, 2H), 4.19-4.12 (m, 1H), 4.07 (s, 3H), 4.01-3.94 (m, 1H), 3.91-3.79 (m, 2H), 3.14-3.03 (m, 1H), 2.81 (s, 1H), 2.68 (s, 1H), 1.43 (s, 9H); MS (ESI): mass calcd. for C29H28ClF3N2O4, 560.2, m/z found 504.9 [M-t-Butyl]+.

Workup

  1. temperatureto warm gradually to room temperature
  2. waitAfter 24 hours
  3. customthe mixture was quenched with aqueous NH4Cl solution
  4. extractionextracted with EtOAc (3×30 mL)
  5. washThe combined organics were washed with brine
  6. dry with materialdried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated to dryness
  9. customChromatography on silica gel (1% acetone-DCM increasing to 5% acetone) provided

Sources & evidence

ORD record
ord-37988f2e80244d8ba06f4755bf66235b
Source dataset
uspto-grants-2016_05
Patent number
US09346782B2

Reaction notes

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