Ethylene Glycol → HCID 178486627, compound

HRID 1740639Notes

Reaction equation

[NH:1]([C:3]1[CH:8]=[C:7]([C:9]2[C:18]3[C:13](=[CH:14][C:15]([O:21][CH3:22])=[C:16]([O:19][CH3:20])[CH:17]=3)[CH:12]=[C:11]([CH2:23][OH:24])[C:10]=2[CH2:25][OH:26])[CH:6]=[CH:5][N:4]=1)[NH2:2].[C:27]1(=O)[O:32][C:30](=[O:31])[C:29]2=[CH:33][CH:34]=[CH:35][CH:36]=[C:28]12.C(O)CO.C(Cl)Cl>O>[OH:32][C:27]1[C:28]2[C:29](=[CH:33][CH:34]=[CH:35][CH:36]=2)[C:30](=[O:31])[N:1]([C:3]2[CH:8]=[C:7]([C:9]3[C:18]4[C:13](=[CH:14][C:15]([O:21][CH3:22])=[C:16]([O:19][CH3:20])[CH:17]=4)[CH:12]=[C:11]([CH2:23][OH:24])[C:10]=3[CH2:25][OH:26])[CH:6]=[CH:5][N:4]=2)[N:2]=1

Participants

Conditions

Temperature: 130 °C

Procedure

A mixture of 1-(2-hydrazino-4-pyridyl)-2,3-bis(hydroxymethyl)-6,7-dimethoxynaphthalene (2.0 g), phthalic anhydride (0.92 g) and ethylene glycol (10 ml) is heated with stirring at 130° C. for two hours. The mixture is cooled to room temperature, and thereto are added methylene chloride and water. The methylene chloride layer is separated, washed, dried, concentrated under reduced pressure to remove the solvent, and the residue is crystallized from ethanol to give 1-[2-{4-(hydroxy)-1(2H)-phthalazinon-2-yl}-4-pyridyl]-2,3-bis(hydroxymethyl)-6,7-dimethoxynaphthalene (1.68 g, yield; 61%), which is listed in Table 10.

Workup

temperatureis heated
temperatureThe mixture is cooled to room temperature
customThe methylene chloride layer is separated
washwashed
customdried
concentrationconcentrated under reduced pressure
customto remove the solvent
customthe residue is crystallized from ethanol

Sources & evidence

ORD record: ord-1d7f45e66da340bd8306c0f7b15b7e2e
Source dataset: uspto-grants-1999_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05969140

Reaction notes

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