申请人:H. Lundbeck & Co. A/S
公开号:US04278676A1
公开(公告)日:1981-07-14
The compound Ia ##STR1## has been shown to possess GABA-related activity. The invention relates to Ia and derivatives thereof, covered by the formula ##STR2## in which R" is hydrogen, acetyl or a group of the general formula ##STR3## in which R.sub.5 is C.sub.1-8 alkyl; phenyl; phenyl substituted in the 4-position with halogen, lower alkoxy, or lower alkyl; or phenylalkyl in which the phenyl group may be substituted in the 4-position with halogen, lower alkoxy, or lower alkyl; and salts thereof. Novel intermediates for preparing I are ##STR4## in which Alk is a lower alkyl group and Z is hydrogen or an amino-protecting group; ##STR5## wherein Z is hydrogen or an amino-protecting group, T is a group convertible, by hydrolysis, into an oxy group, and Q is a leaving group which, on reaction with hydroxylamine, forms a hydroxamic acid group; ##STR6## wherein Z and T are as defined above; ##STR7## wherein Z is as defined above, and W is hydrogen or a group removable to yield the free hydroxy group, with the proviso that at least one of Z and W is different from hydrogen.
化合物Ia ##STR1## 已被证明具有GABA相关活性。本发明涉及Ia及其衍生物,其由公式##STR2##覆盖,其中R"是氢,乙酰或一般式##STR3##中的基团,其中R.sub.5是C.sub.1-8烷基;苯基;在4位上用卤素,较低的烷氧基或较低的烷基取代的苯基;或苯基烷基,其中苯基可能在4位上用卤素,较低的烷氧基或较低的烷基取代;以及其盐。制备I的新型中间体为##STR4##其中Alk是较低的烷基,Z是氢或氨基保护基团;##STR5##其中Z是氢或氨基保护基团,T是通过水解可以转化为氧基团的基团,Q是离去基团,与羟胺反应形成羟胺酸基团;##STR6##其中Z和T如上所定义;##STR7##其中Z如上所定义,W是氢或可去除的基团,以得到自由羟基团,但至少其中一个Z和W不同于氢。