Ethyl Acetate → (S)-cyclopropyl(6-ethynyl-2-methyl-5-phenoxy-3,4-dihydroquinolin-1(2H)-yl)methanone

HRID 1051719Notes

Reaction equation

HRID 1051719 reaction equation
Br[C:2]1[C:3]([O:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)=[C:4]2[C:9](=[CH:10][CH:11]=1)[N:8]([C:12]([CH:14]1[CH2:16][CH2:15]1)=[O:13])[C@@H:7]([CH3:17])[CH2:6][CH2:5]2.[CH2:25]([Sn](CCCC)(CCCC)C#C)[CH2:26]CC.C(OCC)(=O)C>CN(C)C=O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH:14]1([C:12]([N:8]2[C:9]3[C:4](=[C:3]([O:18][C:19]4[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=4)[C:2]([C:25]#[CH:26])=[CH:11][CH:10]=3)[CH2:5][CH2:6][C@@H:7]2[CH3:17])=[O:13])[CH2:16][CH2:15]1

Participants

6

Reactant 3

HCID 8857Ethyl AcetateHCID 621176EthynyltributyltinHCID 118086215(S)-(6-bromo-2-methyl-5-phenoxy-3,4-dihydroquinolin-1(2H)-yl)(cyclopropyl)methanone

Product 1

HCID 118076322(S)-cyclopropyl(6-ethynyl-2-methyl-5-phenoxy-3,4-dihydroquinolin-1(2H)-yl)methanone

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
120 °C

Procedure

A mixture of (S)-(6-bromo-2-methyl-5-phenoxy-3,4-dihydroquinolin-1(2H)-yl)(cyclopropyl)methanone (0.030 g, 0.08 mmol), tributyl(ethynyl)stannane (0.030 g, 0.09 mmol), and tetrakis(triphenylphosphine)palladium (O) (0.037 g, 0.03 mmol) in N,N-dimethylformamide (1.5 mL) stirred overnight at 120° C. The reaction mixture was cooled to room temperature, poured into ethyl acetate (15 mL), washed with water (2×5 mL) and brine (5 mL), dried over anhydrous sodium sulfate, filtered, and concentrated under vacuum. The residue was purified via preparative thin layer chromatography (eluting with 1:5, ethyl acetate/petroleum ether). The product was further purified by preparative-HPLC with the following conditions (Waters III): Column, Xbridge RP C18, 19×150 mm, 5 um; mobile phase, water (0.05% ammonium bicarbonate) and acetonitrile (50% to 100% acetonitrile in 10 min, flow rate: 20 mL/min); Detector, UV 220&254 nm. This afforded (S)-cyclopropyl(6-ethynyl-2-methyl-5-phenoxy-3,4-dihydroquinolin-1(2H)-yl)methanone (0.004 g, 16%) as a brown semi-solid. 1H NMR (300 MHz, CD3OD) δ ppm 0.65-0.85 (m, 1H), 0.87-1.04 (m, 2H), 1.05-1.25 (m, 4H), 1.38-1.52 (m, 1H), 1.85-2.02 (m, 1H), 2.11-2.47 (m, 2H), 2.62-2.85 (m, 1H), 3.47 (m, 1H), 4.75-4.82 (m, 1H), 6.79 (d, J=8.10 Hz, 2H), 6.95-7.05 (m, 1H), 7.19-7.39 (m, 3H), 7.45 (d, J=8.40 Hz, 1H). MS (ESI, pos. ion) m/z 332 [M+H]+.

Workup

  1. temperatureThe reaction mixture was cooled to room temperature
  2. washwashed with water (2×5 mL) and brine (5 mL)
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under vacuum
  6. customThe residue was purified via preparative thin layer chromatography (eluting with 1:5, ethyl acetate/petroleum ether)
  7. customThe product was further purified by preparative-HPLC with the following conditions (Waters III)
  8. custommobile phase, water (0.05% ammonium bicarbonate) and acetonitrile (50% to 100% acetonitrile in 10 min, flow rate: 20 mL/min)

Sources & evidence

ORD record
ord-f010fe50c5d748bfb395d1ff2b7d1bfc
Source dataset
uspto-grants-2016_07
Patent number
US09388161B2

Reaction notes

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