2,3,3A ,4,5,9B -HEXAHYDRO-7,9-DIHYDROXY-2-OXO-1H-BENZ(E)INDENE-4-CARBOXYLIC ACID DERIVATIVES USEFUL AS INTERMEDIATES IN THE TOTAL SYNTHESIS OF STEROIDS AND THEIR PREPARATION

摘要

Tricyclic aromatic compounds of the formula ##STR1## including those wherein: A. R.sub.1 is H, R.sub.2 is carbomethoxy, and R.sub.3 is methyl; PPB. R.sub.1 is acetyl, R.sub.2 is carbomethoxy, and R. sub.3 is methyl;PPC. R.sub.1 and R.sub.3 are methyl and R. sub.2 is carbomethoxy;PPD. R.sub.1, R.sub.2, and R.sub.3 are hydrogen; andP PE. R.sub.1 and R.sub.3 are methyl and R.sub.2 is hydrogenPPARE INTERMEDIATES FOR THE TOTAL SYNTHESIS OF STEROIDS.