申请人:——
公开号:US03931296A1
公开(公告)日:1976-01-06
New process for the preparation of trans-.DELTA..sup.2 -prostaglandins of the formula ##SPC1## (wherein A represents a grouping of the PGE, PGF or PGA type, X represents --CH.sub.2 CH.sub.2 -- or trans --CH=CH--, R.sub.1 represents an alkyl radical of 1 to 10 carbon atoms or an alkyl radical of 1 to 6 carbon atoms carrying a phenyl substituent or a cycloalkyl substituent of 5 to 7 carbon atoms, R.sub.2 represents a hydrogen atom or an alkyl radical of 1 to 4 carbon atoms) and alkyl esters thereof having 1 to 10 carbon atoms in the chain, which comprises reacting a cyclopentane derivative of the formula: ##SPC2## (where R.sub.3 represents a 2-tetrahydropyranyl group unsubstituted or substituted by at least one alkyl radical, or a 1-ethoxyethyl group) with an alkyl phosphonate of the general formula: ##EQU1## (wherein R.sub.4 represents a methyl or ethyl radical, and R.sub.5 represents an alkyl radical of 1 to 10 carbon atoms), optionally hydrolyzing the resulting trans-.DELTA..sup.2 -prostaglandin ester of the general formula: ##SPC3## To the corresponding acid, optionally converting the 9.alpha.-hydroxy radical in the ester or acid product to an oxo group, and hydrolyzing the tetrahydropyranyloxy or ethoxyethoxy groups in the resulting trans-.DELTA..sup.2 -prostaglandin compound of the formula: ##SPC4## (wherein R.sub.6 represents a hydrogen atom or an alkyl radical of 1 to 10 carbon atoms, Z represents ##EQU2## or C=O) to hydroxy radicals to obtain a trans-.DELTA..sup.2 -PGF or trans-.DELTA..sup.2 -PGE compound of the formula: ##SPC5## And, if desired, converting the PGE alicyclic ring (Z represents C=O) into that of a PGA compound. The trans-.DELTA..sup.2 -prostaglandin products, which are new compounds except for trans-.DELTA..sup.2 -PGE.sub.1, possess typical pharmacological properties of the `natural` prostaglandins.
制备转-Δ2-前列腺素的新工艺,其化学式为##SPC1##(其中A表示PGE,PGF或PGA类型的基团,X表示--CH.sub.2 CH.sub.2 --或trans--CH=CH--,R.sub.1表示1至10个碳原子的烷基或1至6个碳原子的烷基,其携带苯基取代基或5至7个碳原子的环烷基取代基,R.sub.2表示氢原子或1至4个碳原子的烷基),以及其在链中具有1至10个碳原子的烷基酯,其中包括将公式的环戊烷衍生物反应:##SPC2##(其中R.sub.3表示未取代或取代至少一个烷基的2-四氢吡喃基团,或1-乙氧基乙基基团)与一般式的烷基膦酸酯反应:##EQU1##(其中R.sub.4表示甲基或乙基基团,R.sub.5表示1至10个碳原子的烷基),可选择地水解生成一般式的trans-Δ2-前列腺素酯:##SPC3## 转化为相应的酸,可选择地将酯或酸产物中的9α-羟基基团转化为羟基基团,并水解所得的trans-Δ2-前列腺素化合物中的四氢吡喃氧基或乙氧基乙氧基基团,其化学式为:##SPC4##(其中R.sub.6表示氢原子或1至10个碳原子的烷基,Z表示##EQU2##或C=O),使其成为羟基基团,以获得化学式为:##SPC5## 的trans-Δ2-PGF或trans-Δ2-PGE化合物,如有需要,将PGE环戊烷环(Z表示C=O)转化为PGA化合物的环。除了trans-Δ2-PGE.sub.1之外,这些新化合物具有“天然”前列腺素的典型药理特性。