Design of scytalone dehydratase inhibitors as rice blast fungicides: (N-phenoxypropyl)-carboxamides
摘要:
Insights gained from a crystal structure of scytalone dehydratase led to the design of carboxamide inhibitors with a phenoxypropyl group substituted on the nitrogen atom. Potent enzyme inhibitors were synthesized around this motif, the best of which provided excellent control of rice blast disease in greenhouse assays and outdoor field trials. (C) 1999 Elsevier Science Ltd. All rights reserved.
Compounds of Formula I are disclosed which are useful as fungicides
wherein
Q is
X is —O—, —CH(R
11
)— or ═C(R
11
)—;
R
1
is H or C
1
-C
2
alkyl;
R
2
is H; C
1
-C
6
alkyl; C
3
-C
6
cycloalkyl; or phenyl optionally substituted with halogen, cyano, C
1
-C
2
alkyl or C
1
-C
2
alkoxy;
and R
3
-R
11
are as defined in the disclosure. Also disclosed are compositions containing the compounds of Formula I and a method for controlling plant diseases caused by fungal plant pathogens which involves applying an effective amount of a compound of Formula I.