Shell Internationale Research Maatschappij, B.v.

Mandy E Coombs

Terence Gilkerson

David C Jennens

The invention provides thiazinone derivatives of general formula I: ##STR1## wherein X is O, S or NH, and R represents an optionally substituted alkyl, alkenyl, heterocyclic or aryl group; a process for the preparation of such compounds; compositions containing them and their use as fungicides.

Thiazinone derivatives

The invention provides benzothiazinone derivatives of formula ##STR1## wherein R.sub.1 represents a nitrogen-containing heteroaromatic group or a phenyl group substituted by 1 or 2 substituents selected from halogen atoms, alkyl, haloalkyl and alkoxy groups; a process for the preparation of such compounds; compositions containing them and a method of combating plant pathogenic fungi using such compositions or compounds.

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Kent, United Kingdom

Mandy E Coombs