| abstract |
1- [2- (2,4-dichlorophenyl) pentyl] -1H-7,2,4-triazole can be prepared in a isomer-free form by a new simple and economical process by using 2- (2,4-dichlorophenyl) - valero-nitrile in the presence of hydrogen, an acid and a hydrogenation catalyst with a compound H 2 N-NH-R to a compound of the formula converts the compound (III) catalytically to a compound hydrogenated, compounds (IV) with R not equal to H hydrolyzed and the compounds (IV) with R = H or salts thereof with formamide and / or [3- (dimethylamino) -2-azaprop-2-en-1-ylidene] dimethylammonium chloride converted into the 1- [2- (2,4-dichlorophenyl) pentyl] -1H-1,2,4-triazole, or compounds (IV) with R = -COR 'with aqueous formic acid into the corresponding N, N'- Converted bisformyl derivatives and reacted with formamide, optionally in the presence of NH 3 , to give 1- [2- (2,4-dichlorophenyl) pentyl) -1H-1,2,4-triazole. R is hydrogen, -CHO, -COR ', -COOR' or -CONH 2 and R 'is C 1-4 alkyl, benzyl or phenyl. The 1- [2- (2,4-dichlorophenyl) pentyl) -1H-1,2,4-triazole has funicidal activity and can be used to control phytopathogenic fungi. |