Method for the preparation of steroid derivative ketal
申请人:Akzo Nobel, N.V.
公开号:US05955622A1
公开(公告)日:1999-09-21
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.