Methanol → 8-(3-Acetyl-5-propoxy-2-methyl-1,4-dihydro-1,6-naphthyridin-4-yl)-2-methyl-4H-chromen-4-one

HRID 1951406Notes

Reaction equation

HRID 1951406 reaction equation
[C:1]([C:4]1[CH:13]([C:14]2[CH:15]=[CH:16][CH:17]=[C:18]3[C:23]=2[O:22][C:21]([CH3:24])=[CH:20][C:19]3=[O:25])[C:12]2[C:11](=[O:26])[NH:10][CH:9]=[CH:8][C:7]=2[NH:6][C:5]=1[CH3:27])(=[O:3])[CH3:2].S(OCCC)(O[CH2:32][CH2:33][CH3:34])(=O)=O.CO>C1COCC1>[C:1]([C:4]1[CH:13]([C:14]2[CH:15]=[CH:16][CH:17]=[C:18]3[C:23]=2[O:22][C:21]([CH3:24])=[CH:20][C:19]3=[O:25])[C:12]2[C:7](=[CH:8][CH:9]=[N:10][C:11]=2[O:26][CH2:32][CH2:33][CH3:34])[NH:6][C:5]=1[CH3:27])(=[O:3])[CH3:2]

Participants

5

Reactant 3

HCID 887MethanolHCID 69015Sulfuric acid, dipropyl esterHCID 596030093-Acetyl-2-methyl-4-(2-methyl-4-oxo-4H-chromen-8-yl)-4,6-dihydro-1,6-naphthyridin-5(1H)-one

Product 1

HCID 247983328-(3-Acetyl-5-propoxy-2-methyl-1,4-dihydro-1,6-naphthyridin-4-yl)-2-methyl-4H-chromen-4-one

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

130 mg (0.35 mmol) of 3-acetyl-2-methyl-4-(2-methyl-4-oxo-4H-chromen-8-yl)-4,6-dihydro-1,6-naphthyridin-5(1H)-one are suspended in THF (8 ml), and 0.39 ml (0.39 mmol) of N′″-(tert-butyl)-N,N′,N″-tris[tris(dimethylamino)phosphoranylidene]phosphorimide triamide (phosphazene base P4-t-Bu; 1 M in hexane) is added. Then 68 μl (0.41 mmol) of di-n-propyl sulfate are added to the dark red solution. The decolorized solution is stirred for 10 min, then mixed with methanol and concentrated. The residue is purified by preparative HPLC to result in 63 mg (43% of theory) of the title compound as a white solid.

Workup

  1. concentrationconcentrated
  2. customThe residue is purified by preparative HPLC

Sources & evidence

ORD record
ord-aa8890923e23484a9d1c2752399d4066
Source dataset
uspto-grants-2013_03
Patent number
US08404709B2

Reaction notes

Loading…