1H-1,2,4-Triazole → 1-[2-(2,4-dichlorophenyl)-2,2-dimethoxyethyl]-1H-1,2,4-triazole

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Reaction Steps

To a stirred mixture of 19 parts of 1H-1,2,4-triazole and 225 parts of N,N-dimethylformamide are added 8.4 parts of sodium hydride dispersion 78% and stirring is continued till foaming has ceased. Then there are added 29 parts of 1-(2-bromo-1,1-dimethoxyethyl)-2,4-dichlorobenzene and the whole is stirred and refluxed overnight. The reaction mixture is cooled, poured onto water and the product is extracted twice with 2,2'-oxybispropane. The combined extracts are washed with water, dried, filtered and evaporated. The residue is crystallized from petroleumether (activated charcoal), yielding 12.1 parts (44%) of 1-[2-(2,4-dichlorophenyl)-2,2-dimethoxyethyl]-1H-1,2,4-triazole; mp. 87.7° C.

Provenance & Evidence