Synthesis of 3,3-Di(ethoxycarbonyl)-1-vinylpyrrolidin-2-one and Determination of Its Reactivity Ratios with 1-Vinylpyrrolidin-2-one
作者:Marco Bencini、Elisabetta Ranucci、Paolo Ferruti、Claudio Oldani、Emanuela Licandro、Stefano Maiorana
DOI:10.1021/ma050422z
日期:2005.10.1
function linked to the lactam ring. The reactivity ratios for the copolymerization of DEVP with VP were determined in methanol solution according to the Kelen−Tüdös procedure, through polymerization experiments performed at different feed, in which compositional drifts were followed by monitoring monomer conversions by means of 1H NMR spectroscopy. The values of the reactivity ratios obtained were rDEVP
新型1-乙烯基吡咯烷酮-2-酮(VP)衍生物,即3,3-二(乙氧基羰基)-1-乙烯基吡咯烷酮-2-酮(DEVP)和3-(乙氧基羰基)-1-乙烯基吡咯烷酮-2-酮(EVP)通过两步合成途径获得α1,该途径包括将氢原子α抽象为内酰胺C O,然后与氯甲酸乙酯缩合。通过适当地选择反应条件,可以DEVP以高产率获得,通过一个简单的纯化过程。通过酯基的皂化,将DEVP和EVP都转化为1-乙烯基吡咯烷-2--2-酮-3-羧酸钠(VP-COONa),在DEVP的情况下,随后进行脱羧反应。所有单体均通过自由基聚合与VP均聚并共聚,所得聚合物的结构通过1 H和13 C NMR光谱法和分子量通过尺寸排阻色谱法分析。所得的基于DEVP和EVP的聚合物也用碱溶液进行水解,在DEVP单元的情况下,随后进行脱羧反应,这在所有情况下均导致与内酰胺环连接的一种羧酸酯官能团。根据Kelen-Tüdös程序,在甲醇溶液中,通过