Formaldehyde → HCID 13066913, Verbindung
Reaktionsgleichung
[CH3:1][C:2]1[NH:7][C:6](=[O:8])[CH:5]=[CH:4][C:3]=1[C:9]1[CH:14]=[CH:13][N:12]=[CH:11][CH:10]=1.[CH2:15]=[O:16]>>[OH:16][CH2:15][C:5]1[C:6](=[O:8])[NH:7][C:2]([CH3:1])=[C:3]([C:9]2[CH:10]=[CH:11][N:12]=[CH:13][CH:14]=2)[CH:4]=1Komponenten
3
Versuchsvorschrift
The reaction of 6-methyl-5-(4-pyridinyl)-2(1H)-pyridinone with excess formaldehyde at an acidic pH to produce 3-hydroxymethyl-6-methyl-5-(4-pyridinyl)-2(1H)-pyridinone is carried out by heating the reactants at about 75° to 125° C. It is preferably run using an acidic pH of about 2 to 5, a large molar excess of formaldehyde and a reaction temperature of about 90° to 110° C. The quantity of formaldehyde can vary widely provided it is in excess of said 6-methyl-5-(4-pyridinyl)-2(1H)-pyridinone. In practice, a large excess, e.g., from about 10-fold to 100-fold or greater can be used; however, as little as a 2-fold excess or less of formaldehyde can be used although the reaction time is longer. Because of its ready availability and low cost, 37% aqueous formaldehyde solution is preferred.
Quellen und Nachweise
- ORD-Eintrag