Enantioselective synthesis of (+)-equilenin 1 utilizing two types of cascade ringexpansion reactions of smallring systems is described. The first key step is an asymmetric epoxidation–ring expansion reaction of cyclopropylidene derivatives to afford chiral cyclobutanones. We found that both the fructose-derived chiral ketone and the chiral (salen)Mn(III) complex were effective catalysts for the asymmetric
Equilenin derivatives, methods for producing the same and medicaments containing them
申请人:——
公开号:US20040138194A1
公开(公告)日:2004-07-15
Described are novel equilenin derivatives of general formula I
1
methods for producing the same and medicaments containing these compounds.
The new compounds have antioxidative activity and are usable for geroprophylaxis in women and men.
所描述的是通式 I 的新型马钱子苷衍生物
1
的方法以及含有这些化合物的药物。
这些新化合物具有抗氧化活性,可用于预防女性和男性的老年痴呆症。
14,15-.ALPHA.-METHYLEN-EQUILENINDERIVATE, VERFAHREN ZU DEREN HERSTELLUNG UND DIESE ENTHALTENDE ARZNEIMITTEL
申请人:Jenapharm GmbH & Co. KG
公开号:EP1165596A1
公开(公告)日:2002-01-02
14,15-ALPHA-METHYLEN-EQUILENINDERIVATE, VERFAHREN ZU DEREN HERSTELLUNG UND DIESE ENTHALTENDE ARZNEIMITTEL