Method for the preparation of steroid derivative ketal

Details Method for the preparation of steroid derivative ketal Method for the preparation of steroid derivative ketal

1998-08-05

1999-09-21

Dees, Jose' G.

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

Organic compounds

Cyclopentanohydrophenanthrene ring system containing

552539, C07J 100

Patent

active

059556226

ABSTRACT:
The invention relates to a method for the preparation of a compound of formula II: ##STR1## wherein a compound of formula V: ##STR2## is condensed with a compound of the formula CH.sub.3 -C(OR.sub.4 O)-(CH.sub.2).sub.3 -XHal and R.sub.1, R.sub.2, R.sub.3, R.sub.4, X and Hal are as defined by the specification.

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