申请人:LUXEMBOURG INDUSTRIES (PAMOL) LTD.
公开号:EP0341585A1
公开(公告)日:1989-11-15
Novel aryl and heteroaryl 4-cyano-2,2,4-trichlorobutyrates are prepared by reacting a corresponding aryl or heteroaryl trichloroacetate with acrylonitrile in the presence of a catalyst. Also provided is a novel process for producing 3,5,6-trichloropyridin-2-ol comprising cyclization of an aryl or heteroaryl 4-cyano-2,2,4-trichlorobutyrate in an inert organic solvent at elevated temperatures, in the presence of anhydrous hydrogen chloride.
新型芳基和杂芳基 4-氰基-2,2,4-三氯丁酸酯是通过相应的芳基或杂芳基三氯乙酸酯与丙烯腈在催化剂存在下反应制备的。 此外,还提供了一种生产 3,5,6-三氯吡啶-2-醇的新工艺,包括在惰性有机溶剂中,在无水氯化氢存在下,使芳基或杂芳基 4-氰基-2,2,4-三氯丁酸酯在高温下环化。