PROCESSES FOR PREPARATION OF 9,11 EPOXY STEROIDS AND INTERMEDIATES USEFUL THEREIN
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app pub date -
Jul 21, 2006
filing date -
Dec 11, 1995
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Abandoned
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Abstract
Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of epoxymexrenone and other compounds of Formula I wherein: -A-A- represents the group --CHR.sup.4--CHR.sup.5-- or --CR.sup.4.dbd.CR.sup.5-- --R.sup.3, R.sup.4 and R.sup.5 are independently selected from the group consisting of hydrogen, halo, hydroxy, lower alkyl, lower alkoxy, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, cyano, aryloxy, R.sup.1 represents an alpha-oriented lower alkoxycarbonyl or hydroxyalkyl radical, --B--B--represents the group --CHR.sup.6--CHR.sup.7-- or an alpha- or beta-oriented group: where R.sup.6 and R.sup.7 are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy, and R.sup.8 and R.sup.9 are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy, or R.sup.8 and R.sup.9 together comprise a carbocyclic or heterocyclic ring structure, or R.sup.8 or R.sup.9 together with R.sup.6 or R.sup.7 comprise a carbocyclic or heterocyclic ring structure fused to the pentacyclic D ring.
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