1,1'-Biphenyl, mixt. with 1,1'-oxybis(benzene) → HCID 178519808, compound

HRID 526158Notes

Reaction equation

HRID 526158 reaction equation
C1C=CC(C2C=CC=CC=2)=CC=1.C1C=CC(OC2C=CC=CC=2)=CC=1.[Cl:26][C:27]1[N:32]=[CH:31][C:30]([NH:33][CH:34]=[C:35]([C:40]([CH:42]2[CH2:44][CH2:43]2)=[O:41])[C:36]([O:38]C)=O)=[CH:29][CH:28]=1>>[Cl:26][C:27]1[N:32]=[C:31]2[C:30](=[CH:29][CH:28]=1)[N:33]=[CH:34][C:35]([C:40]([CH:42]1[CH2:44][CH2:43]1)=[O:41])=[C:36]2[OH:38]

Participants

3

Reactant 2

HCID 246701,1'-Biphenyl, mixt. with 1,1'-oxybis(benzene)HCID 178500757HCID 178500757, compound

Product 1

HCID 178519808HCID 178519808, compound

Procedure

To a flask containing Dowtherm™ A (500 mL) at 250° C. was added methyl 3-(6-chloropyridin-3-ylamino)-2-(cyclopropanecarbonyl)acrylate (4.2 g, 15 mmol) portion wise over 3 to 5 min and the reaction mixture was stirred for an additional 30 to 45 min. The reaction mixture was removed from the heat source, cooled to room temperature and diluted with hexanes to facilitate precipitation. The solids were filtered, washed with hexanes and dried under vacuum to afford the intermediate (6-chloro-4-hydroxy-1,5-naphthyridin-3-yl)(cyclopropyl)methanone which was stirred with heat at 70° C. in neat phosphorus oxychloride (10 mL) with catalytic N,N-dimethylformamide for 4 h. The reaction was cooled and poured slowly into a vigorously stirring mixture of ice-cold satd. aq. sodium bicarbonate and ethyl acetate. The layers were separated and the organic layer was dried over sodium sulfate, filtered and concentrated. The residue was purified by chromatography (silica, methylene chloride/ethyl acetate) to provide the desired product (0.78 g, 20% over two steps) as a brown solid: 1H NMR (500 MHz, CDCl3) δ 8.93 (s, 1H), 8.39 (d, J=8.7 Hz, 1H), 7.74 (d, J=8.8 Hz, 1H), 2.65 (t, J=7.7, 4.5 Hz, 1H), 1.52-1.42 (m, 2H), 1.32-1.22 (m, 2H); ESI MS m/z 268 [M+H]+.

Workup

  1. customThe reaction mixture was removed from the heat source
  2. additiondiluted with hexanes
  3. customprecipitation
  4. filtrationThe solids were filtered
  5. washwashed with hexanes
  6. customdried under vacuum

Sources & evidence

ORD record
ord-a084be4f390444c4868ede1792fcb6a1
Source dataset
uspto-grants-2016_05
Patent number
US09345709B2

Reaction notes

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