Three naphthalene-based analogues (4 a-c) of the Hoveyda-Grubbsmetathesiscatalyst exhibited immense differences in reactivity. Systematic structural and spectroscopic studies revealed that the ruthenafurane ring present in all 2-isopropoxyarylidene chelates possesses some aromatic character, which inhibits catalystactivity. This aromatic stabilization within the chelate ring may be controlled by
Reactions of K-region oxides of carcinogenic and noncarcinogenic aromatic hydrocarbons. Comparative studies on reactions with nucleophiles and acid-catalyzed reactions.
Several K-region arene oxides of carcinogenic and noncarcinogenic polycyclic aromatic hydrocarbons were synthesized, and their reactivities with various nucleophiles and their acid-catalyzed reactions were discussed. Relationship between these chemical reactivities and mutagenicity was also discussed.
合成了几种致癌和非致癌多环芳烃的 K 区芳烃氧化物,并讨论了它们与各种亲核物的反应活性及其酸催化反应。还讨论了这些化学反应性与致突变性之间的关系。
Anti-androgen compounds
申请人:Arch Development Corporation
公开号:US05208263A1
公开(公告)日:1993-05-04
Disclosed are novel classes of anti-androgen including dihydrophenanthrene derivatives, their method of synthesis and their use in treating disorders associated with excessive androgenic activities.