申请人:Hoffmann-La Roche Inc.
公开号:US05274143A1
公开(公告)日:1993-12-28
A process for the preparation of a tautomeric mixture of compounds of the formulas ##STR1## wherein W is hydrogen or C.sub.6 H.sub.13, which comprises treating a compound of the formula ##STR2## wherein R is unsubstituted or substituted alkoxy, arylalkoxy, aryloxy or amine and R.sup.1 is hydrogen or when R is alkoxy, substituted alkoxy, substituted amine, unsubstituted or substituted arylalkoxy R.sup.1 can also be metal, with a compound of the formula ##STR3## wherein W is as described above, both X and Y are reducible groups or X is hydrogen and Y is a reducible group or Y is hydrogen and X is a reducible group and, Z is hydroxy or a leaving group to form the compound of formula IV ##STR4## wherein W, X, Y and R are as defined above, the compound of formula IV is treated with a low valent metal to form a tautomeric mixture of compounds of formulas I and Ia, which are useful in the synthesis of tetrahydrolipstatin.
一种制备式为##STR1##的化合物的互变异构混合物的方法,其中W为氢或C.sub.6 H.sub.13,包括将式为##STR2##的化合物与式为##STR3##的化合物反应,其中R为未取代或取代的烷氧基、芳基烷氧基、芳氧基或胺基,R.sup.1为氢或当R为烷氧基、取代烷氧基、取代胺基、未取代或取代的芳基烷氧基时,R.sup.1也可以是金属,其中W如上所述,X和Y均为可还原基团或X为氢且Y为可还原基团或Y为氢且X为可还原基团,Z为羟基或离去基团,以形成式为IV的化合物##STR4##其中W、X、Y和R如上所定义,将式为IV的化合物与低价金属反应,以形成式为I和Ia的化合物的互变异构混合物,该混合物在四氢利伐沙班的合成中有用。