公开(公告)号：EP0372922A2

公开(公告)日：1990-06-13

申请号：EP89312703.5

申请日：1989-12-06

申请人： MITSUI TOATSU CHEMICALS, Inc.

发明人： Tsumura, Ryuichiro ,  Fukumura, Kunimitsu ,  Muraishi, Teruo

IPC分类号： C07D207/444

CPC分类号： C07D207/448 ,  C07D207/452

摘要： A process for the preparation of N-substituted maleimides by conducting heat-dehydration and dehydrating imidization of N-substituted maleamic acids under azeotropic distillation of generated water in a solvent mixture containing a solvent capable of forming water azeotrope and an organic aprotic polar solvent, in the presence as catalyst of a zinc salt of a maleamic acid, metallic zinc or a zinc compound which forms a zinc salt of the N-substituted maleamic acid in the reaction system.

摘要翻译： 在含有能够形成水共沸物和有机非质子极性溶剂的溶剂的溶剂混合物中，在产生的水的共沸蒸馏下进行N-取代的马来酰胺酸的热脱水和脱水酰亚胺化，制备N-取代的马来酰亚胺的方法， 作为反应体系中形成N-取代马来酰胺酸锌盐的马来酰胺酸锌金属，金属锌或锌化合物的催化剂的存在。

公开(公告)号：EP0372922B1

公开(公告)日：1994-03-09

申请号：EP89312703.5

申请日：1989-12-06

申请人： MITSUI TOATSU CHEMICALS, Inc.

发明人： Tsumura, Ryuichiro ,  Fukumura, Kunimitsu ,  Muraishi, Teruo

IPC分类号： C07D207/444

CPC分类号： C07D207/448 ,  C07D207/452

公开(公告)号：EP0372922A3

公开(公告)日：1990-11-14

申请号：EP89312703.5

申请日：1989-12-06

申请人： MITSUI TOATSU CHEMICALS, Inc.

发明人： Tsumura, Ryuichiro ,  Fukumura, Kunimitsu ,  Muraishi, Teruo

IPC分类号： C07D207/444

CPC分类号： C07D207/448 ,  C07D207/452

摘要： A process for the preparation of N-substituted maleimides by conducting heat-dehydration and dehydrating imidization of N-substituted maleamic acids under azeotropic distillation of generated water in a solvent mixture containing a solvent capable of forming water azeotrope and an organic aprotic polar solvent, in the presence as catalyst of a zinc salt of a maleamic acid, metallic zinc or a zinc compound which forms a zinc salt of the N-substituted maleamic acid in the reaction system.