申请人:Sumitomo Chemical Company, Limited
公开号:US04480109A1
公开(公告)日:1984-10-30
A process for producing an optically active threo-3-(3,4-dihydroxyphenyl)serine represented by the formula ##STR1## which is useful as a remedy for peripheral orthostatic hypotension or as an antidepressant, which process comprises treating threo-3-(3,4-methylenedioxyphenyl)serine or an N-carbobenzoxy derivative thereof represented by the formula ##STR2## wherein A represents a hydrogen atom or a carbobenzoxy group, with a Lewis acid to form threo-3-(3,4-dihydroxyphenyl)serine or an N-carbobenzoxy derivative thereof represented by the formula ##STR3## wherein A is as defined above, and, if A is a carbobenzoxy group, catalytically reducing the resulting compound of formula [2]; a racemic or optically active threo-N-carbobenzoxy-3-(3,4-methylenedioxyphenyl)serine represented by the formula ##STR4## which is a novel compound useful as an intermediate in the above synthesis; and a process for producing said novel compound.
一种制备光学活性的threo-3-(3,4-二羟基苯基)丝氨酸的方法,该化合物可用作治疗外周直立性低血压或抗抑郁药物,该方法包括将threo-3-(3,4-亚甲二氧基苯基)丝氨酸或其N-羧苄基衍生物用Lewis酸处理,形成threo-3-(3,4-二羟基苯基)丝氨酸或其N-羧苄基衍生物,如果A是羧苄基,则催化还原公式[2]的产物;一种新型化合物racemic或光学活性的threo-N-羧苄基-3-(3,4-亚甲二氧基苯基)丝氨酸,可作为上述合成中间体;以及制备该新型化合物的方法。