Process for the synthesis of 6-bromo-17,21-dihydroxy 3,11,20-tri

Details Process for the synthesis of 6-bromo-17,21-dihydroxy 3,11,20-tri Process for the synthesis of 6-bromo-17,21-dihydroxy 3,11,20-tri

1982-12-27

1984-04-03

Roberts, Elbert L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07J 500

Patent

active

044406908

ABSTRACT:
Disclosed is an improved process for the synthesis of 6-bromo-17,21-dihydroxy-3,11,20-trioxo-1,4,-pregnadienes 17,21-diesters. In particular, this invention relates to the conversion of 17,21-dihydroxy-3,11,20-trioxo-1,4-pregnadienes 17,21-diesters to 6-borom-17,21-dihyroxy-3,11,20-trioxo-1,4-pregnadienes-17-21-diesters via bromination under ionic conditions, e.g. bromine in acetic acid.

REFERENCES:
Djerassi et al., Journal American Chemical Soc. 72, (1950), pp. 4534-4540.

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