Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1978-04-28
1980-02-12
Roberts, Elbert L.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
26023955D, C07J 7100
Patent
active
041883225
ABSTRACT:
The invention relates to a new process for the preparation of 6.alpha.-halo-3-keto-.DELTA..sup.1,4 -pregnadiene-derivatives in two-steps-synthesis affording directly 6.alpha.-halo-derivatives by reacting 3-keto-9.beta.,11.beta.-oxido-.DELTA..sup.1,4 -pregnadiene-derivatives with a suitable acylating or etherifying agent to give the corresponding new 3-enol-derivatives which are finally halogenated by using a suitable halogenating agent.
REFERENCES:
patent: 3465011 (1969-09-01), Stein et al.
patent: 3513160 (1970-05-01), Bright et al.
Castelli Pier P.
Romano Bruno
Blasinachim S.p.A.
Roberts Elbert L.
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