1-Chloromethyl-1H-1,2,4-triazole → Diethyl [(1H-1,2,4-triazol-1-yl)methyl]phosphonate
Reaction equation
Cl[CH2:2][N:3]1[CH:7]=[N:6][CH:5]=[N:4]1.[P:8]([O-:15])([O:12][CH2:13][CH3:14])[O:9][CH2:10][CH3:11].[Na+]>C(#N)C>[N:3]1([CH2:2][P:8](=[O:15])([O:12][CH2:13][CH3:14])[O:9][CH2:10][CH3:11])[CH:7]=[N:6][CH:5]=[N:4]1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A mixture of 18.2 g (0.155 mole) of 1-chloromethyl-1H-1,2,4-triazole, 27.2 g (0.17 mole) of sodium diethyl phosphite and 200 ml of acetonitrile is heated for 2 hours to 60° C. and then refluxed for 16 hours. The precipitate is removed and the solution is concentrated. Fractional distillation of the residue yields 19.1 g (56.5%) of diethyl (1H-1,2,4-triazol-1-yl)methylphosphonate in the form of a colourless oil with a boiling point of 120°-129° C./0.053 mb.