Disclosed are compounds of Formula 1, including all geometric and stereoisomers, N-oxides, and salts thereof,
wherein
A, B, D, R
1
, R
2
, R
3
, X and m are as defined in the disclosure.
Also disclosed are compositions containing the compounds of Formula 1 and methods for controlling plant disease caused by a fungal pathogen comprising applying an effective amount of a compound or a composition of the invention.
A radical type (3+3) cycloaddition of cyclopropane is realized with aryl cyclopropane and nitrone under photoredox catalysis in a highly regio- and diastereoselective manner. The reaction includes a stereospecific three-electron-type nucleophilic ring opening and a 6-endo-trig radical cyclization.