[EN] ALPHA-CYANOACRYLATE ESTER SYNTHESIS<br/>[FR] SYNTHÈSE D'ESTERS D'ALPHA-CYANOACRYLATE
申请人:LOCTITE R & D LTD
公开号:WO2012041395A1
公开(公告)日:2012-04-05
The high temperatures required for cracking the cyanoacrylate oligomers, produced by the Knovenagel condensation of formaldehyde and a cyanoacetate, limit the synthetic diversity and the number of different side chains that can be incorporated into a cyanoacrylate prepared using this method. Accordingly, the diversity of cyanoacrylate monomers prepared industrially is quite limited. Disclosed herein is a method for the preparation of alpha-Cyanoacrylate ester monomers from a variety of phosphonium and ammonium alpha-cyanoacrylate salts. The phosphonium and ammonium alpha-cyanoacrylate salts are of the general formula: (I).
通过Knovenagel缩合反应产生的氰丙烯酸酯寡聚体裂解所需的高温限制了合成多样性和可用于使用该方法制备的氰丙烯酸酯中所包含的不同侧链的数量。因此,工业上制备的氰丙烯酸酯单体的多样性相当有限。本文披露了一种从各种磷铵和铵盐氰丙烯酸酯制备α-氰丙烯酸酯单体的方法。磷铵和铵盐氰丙烯酸酯的一般化学式为:(I)。