申请人:The University of East Anglia
公开号:US05807866A1
公开(公告)日:1998-09-15
A process for producing a compound of the formu5la ##STR1## comprising the step of reacting a compound of the formula ##STR2## with a compound of the formula ##STR3## to form a compound of the formula ##STR4## wherein R.sup.2a is selected from the groups recited above for R.sup.2, or R.sup.2a --X-- is a protected hydroxyl group, and Z is a group of formula --Y--R.sub.5 recited above, or a group that can be converted into a group of said formula --Y--R.sup.5. Intermediates of formula IV and composition containing substantially optically pure enantiomers of Formula (I) are included within the scope of the invention.
生产化合物##STR1##的方法包括将化合物##STR2##与化合物##STR3##反应,形成化合物##STR4##,其中R.sup.2a从上述R.sup.2的组中选择,或者R.sup.2a--X--是一个受保护的羟基,Z是上述的--Y--R.sub.5的组,或者可以转化为所述公式--Y--R.sup.5的组。公式IV的中间体和含有基本光学纯对映体的化合物(I)在本发明的范围内。