申请人:Ayerst, McKenna and Harrison Limited
公开号:US04161608A1
公开(公告)日:1979-07-17
A process for preparing 11-deoxyprostaglandin E.sub.1, E.sub.2 and E.sub.3 and analogs thereof is realized by treating an appropriate di(lower)alkyl 3-(optionally substituted)-2-formylcyclopropane-1,1-dicarboxylate with an ylid prepared from a Wittig reagent of formula (AlkO).sub.2 POCH.sub.2 CO--(c)-CH.sub.3 in which Alk is an alkyl containing one to three carbon atoms and (c) is either (CH.sub.2).sub.q wherein q is an integer from 1 to 6 or cis CH.sub.2 CH.dbd.CH(CH.sub.2).sub.r wherein r is an integer from 0 to 3 to obtain the corresponding compound of formula: ##STR1## in which R.sup.2 is hydrogen, lower alkyl or CH.sub.2 OR.sup.3 wherein R.sup.3 is lower alkanoyl, R.sup.4 is lower alkyl and (c) is as defined herein. The latter compound is reduced with an alkali metal borohydride to yield the corresponding alcohol derivative. Condensation of this alcohol derivative or preferably its corresponding tetrahydropyran-2-yl ether derivative with a triester of formula CH(COOR.sup.6).sub.2 --(a)-(CH.sub.2)pCOOR in which R and R.sup.6 are lower alkyl, (a) is CH.sub.2 CH.sub.2, cis CH.dbd.CH or C.tbd.C and p is an integer from 2 to 4, gives the corresponding cyclopentanonetriester of formula ##STR2## in which (a), (c), p, R, R.sup.4 and R.sup.6 are as defined herein, R.sup.5 is hydrogen or tetrahydropyran-2-yl, respectively, and R.sup.7 is hydrogen or lower alkyl; the lactonized form of the cyclopentanonetriester being obtained from said alcohol derivative in which R.sup.2 is CH.sub.2 OR.sup.3 wherein R.sup.3 is lower alkanoyl. In the instance when R.sup.5 is tetrahydropyran-2-yl the cyclopentanonetriester is treated with an acid to give the corresponding compound in which R.sup.5 is hydrogen. The instant compound is then treated with a base under aqueous conditions, followed by optional esterification and acylation to give the desired 11-deoxy-prostaglandin derivatives of formula ##STR3## in which (a), (c) and p, are as defined herein, (b) is trans CH.dbd.CH, R is hydrogen or lower alkyl, R.sup.1 is hydrogen or lower alkanoyl and R.sup.2 is hydrogen, lower alkyl or CH.sub.2 OR.sup.3 wherein R.sup.3 is hydrogen or lower alkanoyl. The derivatives possess prostaglandin-like biological activity and methods for their use are given.
一种制备11-去氧前列腺素E.sub.1,E.sub.2和E.sub.3及其类似物的方法,通过将适当的二(较低)烷基3-(可选取取代基)-2-甲酰基环丙烷-1,1-二羧酸酯与由公式(AlkO).sub.2 POCH.sub.2 CO-制备的Wittig试剂的ylid处理,其中Alk是含有1至3个碳原子的烷基,(c)是(CH.sub.2).sub.q,其中q是1至6的整数,或者是顺式CH.sub.2 CH=CH(CH.sub.2).sub.r,其中r是0至3的整数,以得到相应的化合物的公式:##STR1## 其中R.sup.2是氢,较低的烷基或CH.sub.2 OR.sup.3,其中R.sup.3是较低的烷酰基,R.sup.4是较低的烷基,(c)如上所定义。后一种化合物用碱金属硼氢化物还原,得到相应的醇衍生物。将此醇衍生物或者更好的是其相应的四氢吡喃-2-基醚衍生物与公式CH(COOR.sup.6).sub.2 --(a)-(CH.sub.2)pCOOR的三酯缩合,其中R和R.sup.6是较低的烷基,(a)是CH.sub.2 CH.sub.2,顺式CH=CH或C.tbd.C,p是2至4的整数,得到相应的环戊烷三酯的公式:##STR2## 其中(a),(c),p,R,R.sup.4和R.sup.6如上所定义,R.sup.5分别为氢或四氢吡喃-2-基,R.sup.7为氢或较低的烷基;从所述醇衍生物中得到环戊烷三酯的内酯形式,其中R.sup.2为CH.sub.2 OR.sup.3,其中R.sup.3为较低的烷酰基。当R.sup.5为四氢吡喃-2-基时,用酸处理环戊烷三酯,得到相应的化合物,其中R.sup.5为氢。然后在水性条件下将瞬时化合物处理为碱,随后进行可选的酯化和酰化,得到所需的公式:##STR3## 其中(a),(c)和p如上所定义,(b)为顺式CH=CH,R为氢或较低的烷基,R.sup.1为氢或较低的烷酰基,R.sup.2为氢,较低的烷基或CH.sub.2 OR.sup.3,其中R.sup.3为氢或较低的烷酰基。这些衍生物具有类似前列腺素的生物活性,并提供了其使用方法。