.DELTA..sup.4,9(11),17(20) -pregnatriene-3-ones

Details .DELTA..sup.4,9(11),17(20) -pregnatriene-3-ones .DELTA..sup.4,9(11),17(20) -pregnatriene-3-ones

1992-05-18

1993-02-16

Cintins, Marianne M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540 30, 540 40, C07J 2100, C07J 3300

Patent

active

051872730

ABSTRACT:
A compound of the formula ##STR1## wherein Hal is chlorine or bromine, R is selected from the group consisting of alkyl of 1 to 6 carbon atoms, aralkyl of 7 to 15 carbon atoms and a silylated group, K is a protective group selected from the group consisting of ##STR2## n is 2 or 3 and the wavy lines mean the groups may have either isomer form or are mixtures thereof which are intermediates for .DELTA..sup.4,9(11),16 -pregnatriene-3-ones.

REFERENCES:
patent: 2744109 (1956-05-01), Ralls
patent: 4216159 (1980-08-01), Hessler et al.
patent: 4357279 (1982-11-01), Walker et al.

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