申请人:Sankyo Company, Limited
公开号:US05719275A1
公开(公告)日:1998-02-17
A method for preparing compounds of formula (I): ##STR1## wherein: R.sup.1 is hydrogen or a hydroxy-protecting group; R.sup.2 is alkyl, alkoxy, halogen, optionally substituted phenyl or optionally substituted phenoxy; R.sup.3 is optionally substituted pyridyl, optionally substituted quinolyl or phenyl group which has a substituent of formula --CYNR.sup.5 R.sup.6, where Y is oxygen or sulfur, and R.sup.5 and R.sup.6 are each alkyl, aryl or aralkyl, or R.sup.5 and R.sup.6 and the nitrogen to which they are attached together form a heterocyclic group; R.sup.4 is hydrogen or an amino-protecting group; and Z is sulfur or oxygen. The process comprises reacting a compound of formula (II): ##STR2## in which R.sup.8, R.sup.9 and R.sup.10 are the same or different and each represents an alkyl group having from 1 to 4 carbon atoms or a phenyl group, with a compound of formula (III): ##STR3## in which R.sup.11 represents an acyloxy, alkylsulfonyl, arylsulfonyl, alkylsulfinyl or arylsulfinyl group.
一种制备式(I)化合物的方法:其中:R.sup.1是氢或羟基保护基;R.sup.2是烷基,烷氧基,卤素,可选地取代的苯基或可选地取代的苯氧基;R.sup.3是可选地取代的吡啶基,可选地取代的喹啉基或具有式--CYNR.sup.5 R.sup.6的取代基的苯基,其中Y是氧或硫,R.sup.5和R.sup.6分别是烷基,芳基或芳烷基,或R.sup.5和R.sup.6和它们所连接的氮共同形成一个杂环基;R.sup.4是氢或氨基保护基;Z是硫或氧。该过程包括将式(II)的化合物与式(III)的化合物反应:其中R.sup.8,R.sup.9和R.sup.10相同或不同,每个代表具有1至4个碳原子的烷基或苯基。其中,式(II)为:##STR2##式(III)为:##STR3##