申请人:SmithKline Beecham p.l.c.
公开号:US20020010155A1
公开(公告)日:2002-01-24
A process for the preparation of a 4-aryl-3-oxymethyl-piperidine of structure (1)
1
in which R is hydrogen or an alkyl, arylalkyl, allyl, acyl, carbonyloxyalkyl, carbonyloxyaryl, or carbonyloxyalkylaryl group, and
Y is a hydrogen atom or an optionally substituted alkyl, arylalkyl, or aryl group, from a carboxy derivative of structure (2)
2
where
A is oxygen or sulphar,
X is one or more of hydrogen, or a readily reducible group,
Z represents either a hydrogen atom or an OY′ group in which Y′ is independently selected from the same groups as Y, and
the broken line circle indicates bonding, appropriate to a tetrahydropyridine, dihydropyridine, pyridine, or piperidine ring
said process comprising
(a) when Y is a hydrogen atom, reducing the compound of structure (2), or
(b) when Y is other than a hydrogen atom
(i) forming an ether from the alcohol product of step (a),
(ii) etherifying the aldehyde compound of structure (2) in which Z is hydrogen, or
(iii) reducing the ester compound of structure (2) in which Z is OY′.
一种制备结构(1)中的4-芳基-3-氧甲基-哌啶的方法,其中R是氢或烷基、芳基烷基、烯丙基、酰基、羰基氧烷基、羰基氧芳基或羰基氧烷基芳基,Y是氢原子或可选择取代的烷基、芳基烷基或芳基,从结构(2)中的羧衍生物进行,其中A是氧或硫,X是一个或多个氢或易还原基团,Z代表氢原子或OY′基团,其中Y′独立选择自Y相同的基团,中断线圆表示键合,适用于四氢吡啶、二氢吡啶、吡啶或哌啶环的过程包括(a)当Y是氢原子时,还原结构(2)的化合物,或(b)当Y不是氢原子时(i)从步骤(a)的醇产物中形成醚,(ii)使结构(2)中Z为氢的醛化合物醚化,或(iii)还原结构(2)中Z为OY′的酯化合物。