申请人:Loctite Corporation
公开号:US05504252A1
公开(公告)日:1996-04-02
A method of preparing an .alpha.-cyanoacrylate ester of a desired alcohol includes the steps of preparing a compound which is an .alpha.-selenoaryl-.alpha.-cyanopropionate ester of the desired alcohol, oxidizing said .alpha.-selenoaryl-.alpha.-cyanopropionate ester to the corresponding selenoxide, eliminating arylselenic acid from the selenoxide to produce said .alpha.-cyanoacrylate ester, and separating said .alpha.-cyanoacrylate ester from the selenic acid. At temperatures of about 0.degree. C. or higher, the elimination step occurs concurrently with the oxidizing step using a peroxide or ozone oxidizing agent. The desired cyanoacrylate ester is obtained in good yield and very high purity. The method can be used to prepare difficult to synthesize plural functional cyanoacrylate monomers and mono- cyanoacrylate monomers regardless of alcohol chain length.
一种制备所需醇的.alpha.-氰基丙烯酸酯的方法,包括以下步骤:制备一种化合物,它是所需醇的.alpha.-硒基芳基-.alpha.-氰丙酸酯,将所述.alpha.-硒基芳基-.alpha.-氰丙酸酯氧化为相应的硒氧化物,从硒氧化物中消除芳基硒酸以产生所述.alpha.-氰基丙烯酸酯,并从硒酸中分离所述.alpha.-氰基丙烯酸酯。在约0℃或更高的温度下,消除步骤与过氧化物或臭氧氧化剂同时进行。所得到的所需氰基丙烯酸酯收率高,纯度非常高。该方法可用于制备难以合成的多官能团氰基丙烯酸酯单体和单官能团氰基丙烯酸酯单体,而不受醇链长度的限制。