申请人:Hoffmann-La Roche Inc.
公开号:US05977381A1
公开(公告)日:1999-11-02
The invention is concerned with a process for making a compound of formula ##STR1## wherein R.sup.1 is hydrogen, alkyl, cyclo-alkyl, alkenyl, aryl or an amino protecting group; and R.sup.2, R.sup.3 each independently is hydrogen, alkyl, cyclo-alkyl, alkenyl or aryl; by reacting a compound of the formula ##STR2## wherein X is a protected hydroxy group; with R.sup.1 NH.sub.2 to form a compound of formula ##STR3## wherein X and R.sup.1 are described herein above; and then reacting the compound of formula III with R.sup.2 R.sup.3 NH under pressure to form the compound of formula I. These compounds are valuable intermediates useful in making cephalosporin derivatives.
这项发明涉及一种制备公式##STR1##的化合物的方法,其中R.sup.1是氢,烷基,环烷基,烯基,芳基或氨基保护基;而R.sup.2,R.sup.3分别独立地是氢,烷基,环烷基,烯基或芳基;通过将公式##STR2##的化合物(其中X是保护羟基)与R.sup.1 NH.sub.2反应,形成公式##STR3##的化合物(其中X和R.sup.1如上述所述);然后将公式III的化合物与R.sup.2 R.sup.3 NH在压力下反应,形成公式I的化合物。这些化合物是有价值的中间体,可用于制备头孢菌素衍生物。