The manufacture of optically active bifunctional compounds of the general formula ##STR1## wherein R represents protected hydroxymethyl, protected formyl or alkoxycarbonyl and R.sup.1 represents a group of the formula ##STR2## in which R.sup.2 and R.sup.3 represents lower alkyl or cycloalkyl or R.sup.2 and R.sup.3 together with the nitrogen atom represent a heterocyclic ring, by isomerizing compounds of the general formula ##STR3## wherein R, R.sup.2 and R.sup.3 have the above significance and R.sup.3 can additionally signify hydrogen, is described. The compounds of formula I are potential intermediates in the manufacture of, interalia, natural vitamin E and natural vitamin K.sub.1.
本文描述了一种制备光学活性双官能化合物的方法,其一般式为##STR1##其中R代表受保护的羟甲基,受保护的甲酰基或烷氧羰基,R.sup.1代表式##STR2##中的一种基团,其中R.sup.2和R.sup.3代表较低的烷基或环烷基,或R.sup.2和R.sup.3与氮原子一起代表杂环环。该方法通过异构化一般式为##STR3##的化合物来制备式I的化合物,其中R,R.sup.2和R.sup.3具有上述意义,R.sup.3还可以表示氢。式I的化合物是制备天然
维生素E和天然
维生素K.sub.1等化合物的潜在中间体。