申请人:Bayer Aktiengesellschaft
公开号:US04731455A1
公开(公告)日:1988-03-15
A process for the preparation of a C(3)-C(4)-transconfigurated .gamma.-butyrolactam of the formula (I) ##STR1## in which R.sup.1 represents hydrogen or alkyl, aryl or aralkyl with in each case up to 10 carbon atoms and R.sup.2 and R.sup.3 are identical or different and represent hydrogen, alkyl, aryl, aralkyl, alkoxy, aryloxy or aralkoxy with in each case up to 10 carbon atoms, acyl with up to 18 carbon atoms, trifluoromethyl, trifluoromethoxy, nitro, hydroxyl, halogen, amino, carboxyl, sulpho, dialkylamino with up to 4 carbon atoms in the alkyl groups or acylamino with up to 18 carbon atoms, in the form of their isomers, isomer mixtures, racemates or optical antipodes, comprising oxidizing a compound of the formula (II) ##STR2## in which R.sup.1, R.sup.2 and R.sup.3 have the above-mentioned meanings, in an inert organic solvent in the presence of a base. Such .gamma.-butyrolactams have an antiamnesic action.
一种制备式(I)的C(3)-C(4)-反式构型的γ-丁内酰胺的方法,其中R1代表氢或烷基,芳基或芳基烷基,在每种情况下最多有10个碳原子,而R2和R3相同或不同,分别代表氢,烷基,芳基,芳基烷基,烷氧基,芳氧基或芳基烷氧基,在每种情况下最多有10个碳原子,酰基具有高达18个碳原子,三氟甲基,三氟甲氧基,硝基,羟基,卤素,氨基,羧基,磺酰基,二烷基氨基,其中烷基中的碳原子最多有4个,或酰胺基具有高达18个碳原子,以其异构体,异构体混合物,外消旋体或光学对映体的形式存在,包括在惰性有机溶剂中在碱存在下氧化式(II)的化合物。这种γ-丁内酰胺具有抗遗忘作用。