IntramolecularDiels−Alderreactions of chiral 2-silahexa-3,5-dienyl α,β-unsaturated esters have been found to afford tetrahydro-4-silaisochroman-1-ones in moderate yields. The best diastereoselectivity was achieved in the reaction of silatriene 8c, in which methyl and triisopropylsilyloxymethyl groups are attached to the silicon atom, with an acrylate as the dienophile under EtAlCl2-catalyzed conditions
Disclosed are compounds of Formula 1, including all stereoisomers, N-oxides, and salts thereof,
wherein
E, X, G, W
2
and Z 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.
Also disclosed are compounds of Formula 1A including all stereoisomers, N-oxides, and salts thereof,
wherein
E, X, G and Z
1
are as defined in the disclosure.
Also disclosed is the use of the compounds of Formula 1A as intermediates for preparing compounds of Formula 1.