申请人:UNIV PITTSBURGH
公开号:WO2004020395A1
公开(公告)日:2004-03-11
A process to produce N-vinylformamide includes the steps o£ reacting hydroxyethyl formamide with a reactant including at least one cyclic anhydride group to form an ester, and dissociating (or cracking) the ester to synthesize N-vinylformamide and a compound including at least one diacid group. The ester can be dissociated using heat. The reactant including at least one cyclic anhydride group can, for example, be succinic anhydride, maleic anhydride, phthalic anhydride, a polymer including at least one cyclic anhydride group, or a solid support to which at least one cyclic anhydride group is covalently tethered. Preferably, the cyclic anhydride is regenerated from the diacid formed in the synthesis of the ester by heating the diacid to dehydrate the diacid. The temperature required to dehydrate diacid groups is preferably higher than the temperature use to dissociate the ester.
生产N-乙烯基甲酰胺的过程包括以下步骤:将羟乙基甲酰胺与包含至少一个环酐基团的反应物反应,形成酯,然后解离(或裂解)酯以合成N-乙烯基甲酰胺和含有至少一个二酸基团的化合物。酯可以通过加热来解离。包含至少一个环酐基团的反应物可以是琥珀酸酐、马来酸酐、邻苯二甲酸酐、至少包含一个环酐基团的聚合物,或者至少一个环酐基团共价连接的固体支持。最好通过加热二酸来脱水生成合成酯过程中形成的二酸。脱水二酸所需的温度最好高于解离酯所用的温度。