Ethanol → 2-(4-Methoxy-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine

HRID 2167635Notes

Reaction equation

HRID 2167635 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]#[C:10][C:11]2[CH:12]=[N:13][C:14]3[C:19]([CH:20]=2)=[C:18]2[CH:21]=[CH:22][C:23]([CH3:25])=[CH:24][C:17]2=[N:16][C:15]=3[NH2:26])=[C:5]([CH3:27])[CH:4]=1.C(O)C>[Pd].C(Cl)Cl>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([CH2:9][CH2:10][C:11]2[CH:12]=[N:13][C:14]3[C:19]([CH:20]=2)=[C:18]2[CH:21]=[CH:22][C:23]([CH3:25])=[CH:24][C:17]2=[N:16][C:15]=3[NH2:26])=[C:5]([CH3:27])[CH:4]=1

Participants

5

Reactant 2

HCID 702EthanolHCID 581665112-((4-Methoxy-2-methylphenyl)ethynyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine2×

Product 1

HCID 498381322-(4-Methoxy-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 6344DichloromethaneSolvent

Procedure

2-(4-methoxy-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine was prepared from 2-((4-methoxy-2-methylphenyl)ethynyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine (from the previous step). To a round bottom flask was added 2-((4-methoxy-2-methylphenyl)ethynyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine (1 eq.) with a stirring bar. Ethanol and methylene chloride (1:2, 0.2 M) were added, followed by palladium in carbon (activated powder, wet, 10% on carbon, 0.1 eq.). The content was degassed (vacuum) followed by hydrogen flush (three times). The reaction mixture was stirred vigorously at room temperature overnight, under a hydrogen balloon. Afterwards the reaction mixture was filtered through a celite pad, and the celite pad was washed subsequently with methylene chloride and EtOAc until the filtrate had no UV absorption. Combined organic washes were concentrated. Flash chromatography (silica gel, 0-50% EtOAc in CH2Cl2) afforded the product 2-(4-methoxy-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine. 1H NMR (CDCl3): δ 8.53 (d, 1H), 8.29 (d, 1H), 8.01 (d, 1H), 7.44 (s, 1H), 7.12 (dd, 1H), 6.93 (d, 1H), 6.67 (d, 1H), 6.60 (dd, 1H), 5.93 (bs, 2H), 3.70 (s, 3H), 3.05-3.00 (dd, 2H), 2.93-2.88 (dd, 2H), 2.44 (s, 3H), 2.19 (s, 3H). LRMS [M+H]=358.2

Workup

  1. customThe content was degassed (vacuum)
  2. customflush (three times)
  3. filtrationAfterwards the reaction mixture was filtered through a celite pad
  4. washthe celite pad was washed subsequently with methylene chloride and EtOAc until the filtrate
  5. customno UV absorption
  6. concentrationCombined organic washes were concentrated

Sources & evidence

ORD record
ord-f487a1f8406a48f4929324275b3c321e
Source dataset
uspto-grants-2015_06
Patent number
US09045470B2

Reaction notes

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