[EN] TRIAZOLOPYRIMIDINE DERIVATIVES<br/>[FR] DERIVES DE TRIAZOLOPYRIMIDINE
申请人:BAYER AGROCHEM KK
公开号:WO2000009508A1
公开(公告)日:2000-02-24
Novel triazolopyrimidine derivatives of formula (I) in which R1, R2, X and Y have the meanings given in the specification, processes for their preparation and their use as fungicides. Intermediates of formulae (II), (V) and (IV) in which R?1, R3, R4, R5¿, X, Y and Z have the meanings given in the specification, and processes for the preparation of the novel intermediates.
Formylation of O-Silylated Enolates by Vilsmeier's Reagent
Abstract Reaction of trimethylsilylenol ethers and Vilsmeier's reagent leads to the corresponding regiocontrolled β-dicarbonyl compounds with high to good yields.