| abstract |
The present invention relates to a process for the preparation of a mixture of sulfated estrogens in such a way as to give a compound of general formula (I) [delta (8,9) -estrone derivatives] - in which R1 is hydrogen, R2 is hydrogen and R3 is O acyl group; or R3 is hydrogen and R2 is O-acyl; or R2 and R3 together are an oxygen power, a mixture of one or more compounds of general formula (II) in which R1, R2 and R3 in formula (II) are as defined above and, in the case of intermittent positions 7-8, a double bond. ŕ |