申请人:Orsan
公开号:US05183891A1
公开(公告)日:1993-02-02
A method for the preparation of compounds of the formula ##STR1## wherein X represents a group of the formula OR.sub.1 or NR.sub.1 R.sub.2, wherein R.sub.1 and R.sub.2 independently represent H or an organic group that forms a stable covalent bond with the N or O of said X; Y is H or an organic group that forms a stable ester with the adjacent COO group; R is an alkyl or aryl group optionally substituted with one or more stable organic substituents; each R.sub.3 independently represents a stable organic group; and n is an integer from 0 to 3; the method using new intermediates of the formula ##STR2## wherein R.sub.3 and Y have the foregoing meanings; W is either F or Cl; and R.sub.9 is a hydrocarbon such as a C.sub.1 -C.sub.4 alkyl or alkenyl group.
一种制备式化合物的方法##STR1##其中X代表式OR.sub.1或NR.sub.1 R.sub.2的基团,其中R.sub.1和R.sub.2独立地代表H或与所述X的N或O形成稳定共价键的有机基团;Y为H或与相邻的COO基团形成稳定酯的有机基团;R为烷基或芳基,可选择地取代一个或多个稳定的有机取代基;每个R.sub.3独立地代表稳定的有机基团;n为0到3之间的整数;所述方法使用式中的新中间体##STR2##其中R.sub.3和Y具有前述含义;W为F或Cl;R.sub.9为碳氢化合物,例如C.sub.1-C.sub.4烷基或烯基基团。