申请人:Ciba Geigy Corporation
公开号:US04556717A1
公开(公告)日:1985-12-03
1-[2-(2,4-Dichlorophenyl)-pentyl]-1H-1,2,4-triazole can be produced, in a novel, simple, economical and isomer-free form, by reacting 2-(2,4-dichlorophenyl)-valeronitrile, in the presence of hydrogen, an acid and a hydrogenation catalyst, with a compound H.sub.2 N--NH--R to a compound of the formula ##STR1## hydrogenating the compound (III) catalytically to a compound ##STR2## hydrolysing compounds (IV) wherein R is not hydrogen, and converting the compounds (IV) wherein R=H, or salts thereof, with formamide and/or [3-(dimethylamino)-2-azaprop-2-en-1-ylidene]-dimethylammonium chloride, into 1-[2-(2,4-dichlorophenyl)-pentyl]-1H-1,2,4-triazole, or converting compounds (IV) wherein R=--COR', with aqueous formic acid, into the corresponding N,N'-bisformyl derivatives, and reacting these with formamide, optionally in the presence of NH.sub.3, to 1-[2-(2,4-dichlorophenyl)-pentyl]-1H-1,2,4-triazole. R in the formulae is hydrogen, --CHO, --COR', --COOR' or --CONH.sub.2, and R' is C.sub.1 -C.sub.4 -alkyl, benzyl or phenyl. 1-[2-(2,4-Dichlorophenyl)-pentyl]-1H-1,2,4-triazole exhibits fungicidal activity, and can be used to control phytopathogenic fungi.
1-[2-(2,4-二氯苯基)-戊基]-1H-1,2,4-三唑可以通过在氢气、酸和氢化催化剂存在下,将2-(2,4-二氯苯基)-戊腈与化合物H.sub.2 N--NH--R反应,制得一种新颖、简单、经济且无异构体的形式。将化合物(III)催化氢化得到化合物##STR2##水解化合物(IV),其中R不是氢,将化合物(IV),其中R=H,或其盐,与甲酰胺和/或[3-(二甲氨基)-2-氮代丙烯基]-二甲基铵氯化物反应,制得1-[2-(2,4-二氯苯基)-戊基]-1H-1,2,4-三唑,或将化合物(IV),其中R=--COR',与水甲酸反应,制得相应的N,N'-双甲酰衍生物,再将其与甲酰胺反应,可选地在NH.sub.3存在下,制得1-[2-(2,4-二氯苯基)-戊基]-1H-1,2,4-三唑。公式中的R是氢、--CHO、--COR'、--COOR'或--CONH.sub.2,而R'是C.sub.1 -C.sub.4 -烷基、苄基或苯基。1-[2-(2,4-二氯苯基)-戊基]-1H-1,2,4-三唑具有杀真菌活性,可用于控制植物病原真菌。