申请人:Roussel Uclaf
公开号:US05194622A1
公开(公告)日:1993-03-16
A process for the preparation of a compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are individually selected from the group consisting of hydrogen, halogen, --CF.sub.3, alkyl, alkoxy and alkylthio of 1 to 8 carbon atoms, alkenyl and alkynyl of 2 to 8 carbon atoms, --SO.sub.2 alk and alk is alkyl of 1 to 8 carbon atoms, optionally substituted aryl, aryloxy and arylthio of 6 to 18 carbon atoms and optionally substituted heteroaryl, heteroaryloxy and heterocyclic of 5 to 6 ring members, R.sub.3 is selected from the group consisting of alkyl of 1 to 8 carbon atoms, alkenyl and alkynyl of 2 to 8 carbon atoms, aryl of 6 to 18 carbon atoms and alkoxyalkoxyalkyl of 3 to 14 carbon atoms, X is selected from the group consisting of --O--, --S-- and --NR.sub.4 --, R.sub.4 is selected from the group consisting of hydrogen, alkyl, alkenyl and alkynyl of up to 8 carbon atoms, --SO.sub.2 alkyl, --SO.sub.2 alkenyl and --SO.sub.2 alkynyl of up to 8 carbon atoms and optionally substituted aryl and --SO.sub.2 aryl of 6 to 18 carbon atoms, the double bond between the heterocycle of 5 member ring and the aromatic nucleus is of E and/or Z geometry comprising reacting a halide of the formula ##STR2## wherein R.sub.3 is as defined above and Hal is hydrogen with a compound of the formula ##STR3## wherein X, R.sub.1 and R.sub.2 have the above definitions in the presence of a base to obtain the corresponding product of formula I in the form of a mixture of isomers and optionally separating the isomers and novel intermediates of formula II.
一种制备公式##STR1##中R.sub.1和R.sub.2分别选择自氢、卤素、--CF.sub.3、1至8个碳原子的烷基、烷氧基和烷硫基、2至8个碳原子的烯基和炔基、--SO.sub.2烷基和烷基为1至8个碳原子、可选择取代的6至18个碳原子的芳基、芳氧基和芳硫基以及可选择取代的5至6个环成员的杂环芳基、杂环芳氧基和杂环的化合物的过程。其中R.sub.3选择自1至8个碳原子的烷基、2至8个碳原子的烯基和炔基、6至18个碳原子的芳基和3至14个碳原子的烷氧烷氧基烷基,X选择自--O--、--S--和--NR.sub.4 --,R.sub.4选择自氢、烷基、烯基和炔基,其碳原子数量不超过8个、--SO.sub.2烷基、--SO.sub.2烯基和--SO.sub.2炔基,其碳原子数量不超过8个,以及可选择取代的6至18个碳原子的芳基和--SO.sub.2芳基。其中5环杂环和芳香核之间的双键为E和/或Z几何异构体,包括在碱存在下反应公式##STR2##中R.sub.3如上所述,Hal为氢,与公式##STR3##中X、R.sub.1和R.sub.2具有上述定义的化合物反应,以获得相应的I式产物的混合异构体,并可分离异构体和II式新中间体。