申请人:Sankyo Company, Limited
公开号:US05656758A1
公开(公告)日:1997-08-12
A process for preparing a compound of the formula (I): ##STR1## in which, R.sup.1 and R.sup.2 each represents hydrogen or C.sub.1 -C.sub.6 alkyl, or R.sup.1 and R.sup.2 together with the nitrogen atom to which they are attached form a heterocycle; E represents methylene, sulfur, oxygen or imino group optionally substituted with C.sub.1 -C.sub.6 alkyl or aralkyl; ring A is aryl or heteroaryl ring, optionally substituted; R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl and R.sup.4 is hydrogen or R.sup.3 and R.sup.4 together represent a group of formula (IV): --(CR.sup.a R.sup.a).sub.m --C(.dbd.Y)-- (IV) (wherein R.sup.a and R.sup.a is C.sub.1 -C.sub.6 alkyl or hydrogen, up to a maximum of 3 alkyl groups, m is 1, 2, or 3, and Y is two hydrogens or oxygen); provided that when E represents a methylene group, then R.sup.3 is a C.sub.1 -C.sub.6 alkyl group or R.sup.3 and R.sup.4 together represent a group of the formula (IV), which comprises reacting an acid of the formula ##STR2## with an amine of the formula ##STR3##
一种制备化合物(I)的方法:其中,R.sup.1和R.sup.2分别表示氢或C.sub.1-C.sub.6烷基,或者R.sup.1和R.sup.2与它们所连接的氮原子形成杂环;E表示亚甲基、硫、氧或亚胺基,可选地被C.sub.1-C.sub.6烷基或芳基烷基取代;环A是芳基或杂芳基环,可选地被取代;R.sup.3是氢或C.sub.1-C.sub.6烷基,R.sup.4是氢或R.sup.3和R.sup.4共同表示式(IV)的一个组,其中,--(CR.sup.aR.sup.a).sub.m--C(.dbd.Y)--(IV)(其中,R.sup.a和R.sup.a是C.sub.1-C.sub.6烷基或氢,最多3个烷基基团,m为1、2或3,Y为两个氢或氧);但当E表示亚甲基时,R.sup.3是C.sub.1-C.sub.6烷基或R.sup.3和R.sup.4共同表示式(IV)的一个组。该方法包括将式为##STR2##的酸与式为##STR3##的胺反应。