Process for the preparation of 1,2,3-triazoles substituted in the 2-position

A process for the preparation of a compound of the formula ##STR69## wherein R.sub.1 and R.sub.2 each independently is C.sub.1 -C.sub.18 -alkyl;

• C.sub.1 -C.sub.18 -alkyl substituted by --OH, halogen, amino, C.sub.1 -C.sub.4 -alkoxy, cyano, carboxyl, carbalkoxy, carbamoyl;
• alkylsulphonyl or arylsulphonyl or sulphamoyl;
• cyclohexyl;
• cyclopentyl;
• vinyl;
• allyl;
• propenyl;
• phenyl;
• phenyl substituted by halogen, alkyl, alkoxy, nitro, cyano, phenyl, carboxyl, sulpho, carbalkoxy, carbamoyl, sulphamoyl, sulphonic acid esters, alkylcarbonyl or arylcarbonyl;
• naphthyl;
• pyridyl;
• thienyl;
• or benzyl radicals or phenylethyl radicals, or
• R.sub.1 and R.sub.2, together with the triazole ring carbon atoms to which they are bonded, can also form 5-membered or 6-membered carbocyclic ring, and
• R.sub.3 is phenyl;
• naphthyl;
• pyridyl or coumarin-7-yl optionally substituted by phenyl, by naphthyl, by alkoxycarbonyl or by 1,2,4-triazol-1-yl, 1,2,3-triazol-1-yl or 1,2,3-triazol-2-yl, it being possible for the triazolyl radicals to carry 5-alkyl-, aryl- and aralkylsubstituents, it also being possible for the radicals in the 4-position and 5-position to form, together, the remaining members of a fused-on benzene ring or naphthalene ring;
• pyrazolyl;
• pyrazolyl substituted by halogen, alkyl, aryl and aralkyl;
• thien-2-yl;
• carbostyril-7-yl;
• 2-styrylbenztriazol-5-yl;
• 5-phenyl-1,2,4-thiadiazolyl;
• 2-methyl or styryl-benzoxazol-5-yl or -6-yl and 2-methyl or styryl-benzthiazol-5-yl or -6-yl,
• comprising contacting a compound of the formula ##STR70## with a basic compound at a temperature between about 20.degree. and 150.degree. C.