Novel precursors for the synthesis of methyl-9-oxo-11.alpha.,16-dihydroxy-16-vinyl-5-cis-13-trans prostadienoates having the formulae ##STR1## wherein R.sub.1 is H or C.sub.1 -C.sub.4 alkyl; R.sub.2 is C.sub.1 -C.sub.4 alkyl, R.sub.3 is H, C.sub.1 -C.sub.4 trialkylsilyl or C.sub.1 -C.sub.6 alkyl; X.sub.1 is halogen, cyano, C.sub.1 -C.sub.4 alkoxycarbonyl, carboxy or tri (C.sub.1 -C.sub.4 alkoxy)methyl; n is 2-4 inclusive; and P.sub.1 is H or a blocking or protective group; congeners and racemic mixture of these compounds and processes of synthesizing them.
合成甲基-9-氧-11.alpha.,16-二羟基-16-
乙烯基-5-顺式-13-反式前列腺二烯酸酯的新型前体,其
化学式为##STR1##其中,R.sub.1为H或C.sub.1-C.sub.4烷基;R.sub.2为C.sub.1-C.sub.4烷基,R.sub.3为H,C.sub.1-C.sub.4三烷基
硅基或C.sub.1-C.sub.6烷基;X.sub.1为卤素,
氰基,C.sub.1-C.sub.4烷氧羰基,羧基或三(C.sub.1-C.sub.4烷氧基)甲基;n为2-4,P.sub.1为H或阻断或保护基;还包括这些化合物的同系物和外消旋混合物以及合成它们的过程。