Hoffmann-la Roche Inc.

Franz Dorn

Milos Suchy

Francois Montavon

Albert Pfiffner

Beat Zehnder

Novel pyridine and pyrazine derivatives of the formula ##STR1## wherein R.sup.4 is 3-pyridyl, 3-pyridyl-1-oxide, 2-pyrazinyl, 2-pyrazinyl-1-oxide, 2-pyrazinyl-4-oxide or 2-pyrazinyl-1,4-dioxide, and R, R.sup.1, R.sup.2 and R.sup.3 are as hereinafter set forth, processes for their preparation, fungicidal compositions containing said compounds, and methods for the use of such compounds or compositions for combatting fungi in agriculture and in horticulture are disclosed. Novel starting materials and fungicidal active substances of the formula ##STR2## wherein R.sup.4' is 3-pyridyl or 2-pyrazinyl, and R and R.sup.1' as hereinafter set forth, which are used for the preparation of the compounds of formula I, and their N-oxides, as well as fungicidal compositions containing these compounds as the active substance, are also described.

Certain fungicidal alphabenzyl-3-pyridylmethanol, the corresponding

Novel pyridine, pyrazine and pyrimidine derivatives of the formula ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as hereinafter set forth, and acid addition salts thereof, processes for their preparation, fungicidal compositions containing these compounds as the active ingredient as well as the use of such compounds or compositions for the control of fungi in agriculture and in horticulture are disclosed.

Certain .alpha.-benzyl-3-pyridylmethanols, N-oxides thereof and their

Pyridine and pyrazine compounds of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as hereinafter set forth and acid addition salts of these compounds, processes for their preparation, fungicidal compositions containing these compounds as the active ingredients and methods for the use of such compounds or compositions for combating fungi in agriculture and horticulture are disclosed.

Pyridine and pyrazine oxime compounds as fungicides

Pyridine derivatives

1,3-Dioxolane derivatives of the formula ##STR1## wherein R is hydrogen or C.sub.1-4 -alkyl, and acid addition salts of these compounds, a process for their preparation, fungicidal compositions containing these compounds as the active ingredient and methods for the use of such compounds or compositions for combatting fungi in agriculture and in horticulture are disclosed.

1,3-Dioxolane compounds and their use as fungicides

N-alkynylanilides, a process for their preparation, fungicidal compositions containing the N-alkynylanilides as the active ingredient and methods for the use of such compounds or compositions for combatting plant fungi are disclosed.

Growing community of inventors

Dielsdorf, Switzerland

Franz Dorn