申请人:Stauffer Chemical Company
公开号:US04210589A1
公开(公告)日:1980-07-01
Process for the preparation of monocyclic aromatic N-substituted halo-2-pyrrolidinones having the formula ##STR1## in which X is hydrogen, chlorine or methyl; Y is hydrogen, chlorine or bromine, Z is chlorine or bromine; R.sub.2 is alkyl or hydrogen; R is hydrogen, alkyl, acetyl, chlorine, bromine, fluorine, iodine, trifluoromethyl, nitro, cyano, alkoxy, alkylthio, alkylsulfinyl, alkylsulfonyl, trifluoromethylthio, trifluoromethylsulfinyl, trifluoromethylsulfonyl, pentafluoropropionamido, or 3-methylureido; and R.sub.1 is hydrogen, alkyl, chlorine or trifluoromethyl; which comprises the steps of heating an N-alkenyl haloacyl amide in the presence of a catalytic amount of ferrous ion and recovery of the resulting product.
制备单环芳香族N-取代卤代-2-吡咯酮的过程,其化学式为##STR1##
其中,X为氢、氯或甲基;Y为氢、氯或溴,Z为氯或溴;R.sub.2为烷基或氢;R为氢、烷基、乙酰、氯、溴、氟、碘、三氟甲基、硝基、氰基、烷氧基、烷基硫基、烷基亚磺酰基、烷基磺酰基、三氟甲基硫基、三氟甲基亚磺酰基、三氟甲基磺酰基、五氟丙酰胺基或3-甲基脲基;R.sub.1为氢、烷基、氯或三氟甲基;包括以下步骤:在铁离子的催化下加热N-烯丙基卤代酰胺,并回收所得产物。