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    • 7. 发明申请
    • Production Method of Polycyclic Lactams
    • 多环内酰胺的生产方法
    • US20090118519A1
    • 2009-05-07
    • US12297113
    • 2006-06-28
    • Norihiko HirataToshitsugi UemuraHideki Ushio
    • Norihiko HirataToshitsugi UemuraHideki Ushio
    • C07D209/48
    • C07D209/48C07D209/52
    • A process for producing lactams of formula (1) below, including the step of reacting lactones of formula (2) below with imides of any of formulae (3a), (3b) and (3c) to thereby obtain corresponding carboxylic acids (step A); the step of esterifying the carboxylic acids into corresponding esters (step B); and the step of reacting the esters with amines to thereby obtain lactams of the formula (1) (step C). In the formulae (1)-(2) and (3a)-(3c), when R3 and R4 are simultaneously hydrogen atoms, R is a substituted methylene or optionally substituted polymethylene; when at least one of R3 and R4 is a substituent other than hydrogen atom, R is an optionally substituted methylene or polymethylene; each of R3, R4, R5 and R6 independently is a hydrogen atom, a halogen atom, cyano, etc.; each of A1, A2, A3, A4, A5, A6, A7, A8, A9 and A10 independently is a hydrogen atom, a halogen atom, nitro, etc.; and M is a hydrogen atom or an alkali metal atom.
    • 一种生产下式(1)的内酰胺的方法,包括使下式(2)的内酯与式(3a),(3b)和(3c)中任一式的酰亚胺反应的步骤,从而得到相应的羧酸(步骤A ); 将羧酸酯化成相应的酯(步骤B)的步骤; 以及使酯与胺反应从而得到式(1)的内酰胺(步骤C)的步骤。 在式(1) - (2)和(3a) - (3c)中,当R3和R4同时为氢原子时,R为取代的亚甲基或任选取代的聚亚甲基; 当R 3和R 4中的至少一个是除氢原子以外的取代基时,R是任选取代的亚甲基或聚亚甲基; R 3,R 4,R 5和R 6各自独立地为氢原子,卤原子,氰基等; A1,A2,A3,A4,A5,A6,A7,A8,A9和A10各自独立地为氢原子,卤素原子,硝基等; M是氢原子或碱金属原子。
    • 9. 发明授权
    • Process of producing 2-cyano-4-oxo-4H-benzopyran compounds
    • 制备2-氰基-4-氧代-4H-苯并吡喃化合物的方法
    • US5659051A
    • 1997-08-19
    • US273119
    • 1994-07-11
    • Takayuki HigashiiHideki UshioYukari FujimotoTsutomu MatsumotoMasayoshi MinaiKatsuichi YasunagaHiroshi SogabeTakahiro Kotera
    • Takayuki HigashiiHideki UshioYukari FujimotoTsutomu MatsumotoMasayoshi MinaiKatsuichi YasunagaHiroshi SogabeTakahiro Kotera
    • C07D311/24
    • C07D311/24
    • There is disclosed a process of producing a 2-cyano-4-oxo-4H-benzopyran compound of the general formula (2): ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen, halogen, hydroxy, C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy, nitro or a group of the RCONH wherein R is C.sub.1 -C.sub.20 alkyl, phenyl, phenyl-substituted (C.sub.1 -C.sub.20) alkyl, phenyl (C.sub.1 -C.sub.20)alkoxyphenyl or (C.sub.1 -C.sub.20) alkoxyphenyl. This production process is characterized in that a carboxamide of the general formula (1): ##STR2## wherein R.sup.1 and R.sup.2 are each as defined above, is reacted with a dehydrating agent in the presence of a pyridine compound of the general formula (4): ##STR3## wherein A.sup.1 and A.sup.2 are independently hydrogen or C.sub.1 -C.sub.5 alkyl. If the final product cannot be obtained as crystals having good filtration properties by ordinary treatments, a novel technique as disclosed herein can provide such crystals by dissolving the reaction product in an organic solvent insoluble or slightly soluble in water; pouring the resultant solution into water; and removing the organic solvent by distillation with stirring to effect the crystallization of the final product.
    • 公开了通式(2)的2-氰基-4-氧代-4H-苯并吡喃化合物的制备方法:其中R 1和R 2独立地是氢,卤素,羟基,C 1 -C 5烷基 硝基或其中R为C 1 -C 20烷基,苯基,苯基取代的(C 1 -C 20)烷基,苯基(C 1 -C 20)烷氧基苯基或(C 1 -C 20)烷氧基苯基)的RCONH基团。 该制造方法的特征在于通式(1)的羧酰胺:其中R 1和R 2各自如上所定义,与脱水剂在通式(Ⅴ)的吡啶化合物存在下反应, (4):其中A1和A2独立地为氢或C1-C5烷基。 如果通过常规处理不能获得具有良好过滤性能的结晶的最终产品,则本文公开的新技术可以通过将反应产物溶解在不溶或微溶于水的有机溶剂中来提供这种晶体; 将所得溶液倒入水中; 并在搅拌下通过蒸馏除去有机溶剂以实现最终产物的结晶。