Depentyl analogues of prostaglandins A, E, and F having no C-16 to C-20 carbon atoms. The analogues correspond to the formula ##STR1## wherein: L is methylene, ethylene or trimethylene; K is ethylene or cis-vinylene; M is carbonyl, .alpha.-hydroxymethylene, or .beta.-hydroxymethylene; N is methylene or methine, provided that N is methine only if P is methine and M is carbonyl; P is methylene, ethylene, .alpha.-hydroxymethylene or methine, provided that P is methine only if N is methine; and, R is carboxyl; hydroxymethylene, alkoxycarbonyl, the alkyl portion of said alkoxycarbonyl being a lower alkyl, or a pharmacologically acceptable non-toxic carboxy salt. The analogues are prepared by first converting a trans-1-iodo-3-alkoxy-1-propene to the corresponding lithio compound. This lithio compound then combines with the hexamethylphosphorous triamide complex of copper(I) pentyne to give an alkenylcopper species. Reacting this alkenylcopper compound with the appropriate 2-substituted-cyclopent-2-enone or 2-substituted-cyclohex-2-enone gives the desired depentyl prostaglandins.
Depentyl类
前列腺素A、E和F的类似物,其C-16到C-20碳原子不存在。该类似物对应于以下式子:##STR1##其中:L为亚甲基、
乙烯或三亚甲基;K为
乙烯或顺式-
乙烯基;M为羰基、α-羟甲亚基或β-羟甲亚基;N为亚甲基或亚甲基,但仅当P为亚甲基且M为羰基时,N才为亚甲基;P为亚甲基、
乙烯、α-羟甲亚基或亚甲基,但仅当N为亚甲基时,P才为亚甲基;R为羧基;羟甲亚基、烷氧羰基,其烷基部分为较低的烷基,或药理学上可接受的无毒
羧酸盐。该类似物首先通过将反-1-
碘-3-烷氧基-
1-丙烯转化为相应的
锂化合物来制备。然后,该
锂化合物与
铜(I)戊炔的六
甲基膦酰胺配合物结合,形成烯基
铜物种。将该烯基
铜化合物与适当的2-取代环戊-2-酮或2-取代环己-2-酮反应,即可得到所需的Depentyl
前列腺素。