申请人:Hercules Incorporated
公开号:US05097029A1
公开(公告)日:1992-03-17
Processes for preparing 2,3-dihydro-1,3-dialkyl-2,2-dialkyl perimidines and N,N'-dialkyl-1,8-naphthalene diamines are disclosed. The 2,3-dihydro-1,3-dialkyl-2,2-dialkyl perimidines are prepared by alkylating 2,3-dihydro-2,2-dialkyl perimidines with an alkylating agent in a water miscible organic solvent at room temperature to 80.degree. C. in the presence of water and an inorganic base. N,N'-dialkyl-1,8-naphthalene diamines are prepared by hydrolyzing the 2,3-dihydro-1,3-dialkyl-2,2-dialkyl perimidines with strong aqueous acid in an aqueous organic solvent and removing a ketone by-product and the aqueous organic solvent by codistillation.
公开了制备2,3-二氢-1,3-二烷基-2,2-二烷基吡咯并N,N'-二烷基-1,8-萘二胺的方法。通过在水溶性有机溶剂中,在室温至80摄氏度条件下,在水和无机碱的存在下,用烷基化试剂烷基化2,3-二氢-2,2-二烷基吡咯制备2,3-二氢-1,3-二烷基-2,2-二烷基吡咯。通过在含强水酸的水性有机溶剂中水解2,3-二氢-1,3-二烷基-2,2-二烷基吡咯,并通过共蒸馏去除酮副产物和水性有机溶剂,制备N,N'-二烷基-1,8-萘二胺。