Depentyl analogues of 11-deoxy-prostaglandin E.sub.1

Abstract

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.

Dependencies are inferred from the claim text.