| 摘要 |
Compounds of formula (I), where A is NH or O; X is N or CH; R<2> is hydrogen or alkyl; R<3> and R<4>, which may be the same or different, are alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, alkoxy, alkylthio, phenyl or heterocyclyl, each of which is optionally substituted, hydrogen, cyano, a group -COR<20> or a group -C(R<21>)=N-OR<22>, with the proviso that R<3> and R<4> are not simultaneously hydrogen; or R<3> and R<4>, together with the carbon atom to which they are attached, form an optionally substituted 5- to 7-membered ring optionally including one to three heteroatoms selected from N, O and S; R<20> is alkyl, cycloalkyl, phenyl, heterocyclyl or amino, each of which is optionally substituted, or is hydrogen; R<21> has the same meaning as R<20> and may also be cyano; and R<22> has the same meaning as R<20> and may also be -COR<20>, have activity as fungicides. |
