16-methyl-.DELTA..sup.1,4 -pregnadiene-3,20-diones

Abstract

A compound having the formulae selected from the group consisting of ##STR1## wherein R.sub.2 and R.sub.3 are hydrogen or R.sub.2 is fluorine and R.sub.3 is formyloxy or acetyloxy, the dotted line in 9(11) position indicates an optional double bond and the dotted line in position 16(17) indicates an optional double bond ##STR2## is a 3-keto-.DELTA..sup.4 -system or 3-keto-.DELTA..sup.1,4 -system or 3-OR.sub.4 -.DELTA..sup.5 -system, R.sub.4 is hydrogen or a protector group of hydroxy, R is --CH.sub.3, --CH.sub.2 OH or --CH.sub.2 --OR', R' is a hydroxy protector group and R'.sub.1 is selected from the group consisting of methyl, a branched alkyl of 5 to 8 carbon atoms not possessing hydrogen in the .beta.-position, aryl of up to 10 carbon atoms and benzyl, hetroaryl of up to 10 carbon atoms and at least one heteroatom selected from the group consisting of nitrogen, sulfur and oxygen, with the exception of the compounds of formula Vc in which R is methyl, R.sub.2 and R.sub.3 are hydrogen or R.sub.2 and R.sub.3 together form a second carbon-carbon bond useful as intermediates for the preparation of compounds of Formula I as defined in the application.

Dependencies are inferred from the claim text.