| 摘要 |
NEW MATERIAL:The compound of formula I (R<1> is H or lower alkyl; R<2> is lower alkoxy). EXAMPLE:4-( 2,4-Dichlorophenyl )-4-( 1, 2,4-triazol-1-yl )methyl-2-ethoxy-2-methyl-1, 3-dioxolane. USE:Agricultural and horticultural fungicide. PREPARATION:The objective compound of formula I can be prepared by reacting 2-(2,4-dichlorophenyl)-3-(1,2,4-triazol-1-yl)-1,2-propanediol with more than equivalent amount of the acetal of formula II (R<3> is alkyl) preferably in a solvent such as toluene, in the presence of an acid catalyst such as p-toluenesulfonic acid, at a temperature between room temperature and the boiling point of the solvent.
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