There is presented a process for the manufacture of hexahydronaphthacene derivatives of the general formula ##STR1## wherein one of R.sup.1 and R.sup.2 represents a hydrogen atom and the other represents a hydrogen atom or a hydroxy group or R.sup.1 and R.sup.2 together represent a protected oxo group, R.sup.3 represents a hydrogen atom or a hydroxy or acyloxy group and R.sup.4 represents a lower alkyl or esterified carboxy group or a group of the formula ##STR2## wherein R.sup.5 and R.sup.6 together form an oxo group or a protected oxo group and X represents a hydrogen atom or a hydroxy or acyloxy group or ##STR3## in which n stands for 1 or 2 and Y represents a hydrogen atom or an alkyl or acyl group. Also presented are certain of the novel derivatives per se and various novel intermediates in the process.
Process for the preparation of hexahydronaphthacene derivatives
申请人:F. HOFFMANN-LA ROCHE & CO.
Aktiengesellschaft
公开号:EP0013577A2
公开(公告)日:1980-07-23
Cyclic compounds of the general formula
wherein one of R' and R2 is hydrogen and the other is hydrogen or hydroxy or R' and R2 taken together are a protected oxo group; R3 is hydrogen, hydroxy or acyloxy; R' is lower alkyl, esterified carboxy or a group of the formula -C(R5, R6) -CH2-X; R' and R'taken together are oxo or protected oxo; X is hydrogen, hydroxy, acyloxy or -(CH2)n-OY; Y is hydrogen, alkyl or acyl and n is 1 or 2; with the proviso that one of R1 and R2 is hydrogen and the other is hydroxy or R1 and R2 taken together are protected oxo when R' is acetoxy and R' is acetyl;
processes for the preparation thereof and intermediates in these processes.