American Cyanamid Company

Basf Aktiengesellschaft

Guenter Krummel

Waldemar F Pfrengle

Guido Albert

Annerose Edith Rehnig

Klaus-Juergen Pees

Leslie May

Henry Van Tuyl Cotter

Marcus Rainer Knell

Henry Van Cotter

The novel compounds of formula I:wherein (R, R, Hal and Lthrough Lare defined in the specification) show selective fungicidal activity. The new compounds may be processed with carriers and adjuvants to produce fungicidal compositions.

Fungicidal trifluoromethylalkylamino-triazolopyrimidines

The novel compounds of formula I: wherein

The novel compounds of formula I: ##STR1## wherein R.sup.1, R.sup.2, Hal and L.sup.1 through L.sup.5, are defined in the specification show selective fungicidal activity.

An effective and efficient process for the preparation of dialkyl arylmalonates of formula I, ##STR1## (ring A and R are defined in the specification). In this process, an arylmethylhalide of formula II ##STR2## is treated with magnesium in an inert solvent, the resulting Grignard reagent is treated with a dialkyl carbonate or an alkyl chloroformiate, and the resulting reaction mixture is treated with a base.

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Vendersheim, Germany

Guenter Krummel