Chromones useful as fungicides

摘要

Compounds of formula (I) in which Z is O, S(O)n or NR, and a) P is WR<2>; and Q is R<1> or W<2>R<2a> or b) P is R and Q is R; and when Z is S(O)n or NR, and Q is W<2>R<2a>; P can be R<1>; W and W<2>, which may be the same or different, are O, S(O)n, N(R<3>), N(R<3>)N(R<4>), N(R<3>)O or ON(R<3>); R<1> is hydrogen, or an optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, phenyl or heterocyclyl group; R, R<2>, R<2a>, R<2b>, R<3> and R<4>, which may be the same or different, have the same meaning as R<1>, or are acyl, or any two adjacent R groups together with the atoms to which they are attached form an optionally substituted ring which may contain other heteroatoms; R and R, which may be the same or different, have the same meaning as R<1> (heterocyclyl groups being carbon linked) or are cyano, nitro, COOR<1> or COR<1>, each X, which may be the same as or different from any other X, is halogen, CN, NO2, SF5, B(OH)2, trialkylsilyl or a group E, OE or SE where E is a group as defined hereinbefore for R or is optionally substituted amino; or two adjacent groups X together with the atoms to which they are attached form an optionally substituted carbocyclic or heterocyclic ring; n is 0, 1 or 2; and p is 0 to 4 have fungicidal activity.