Synthesis, Structure, and Reactivity of Unexpectedly Stable Spiroepoxy-β-Lactones Obtained by Epoxidation of 4-Alkylidene-2-Oxetanones
摘要:
We describe the first synthesis of spiroepoxy-beta-lactones obtained via epoxidation of ketene dimers. These compounds display unexpected stability that may be due to a double anomeric effect garnered from analysis of bond lengths by X-ray crystallography of one spirocycle in comparison to calculated bond lengths of related structures. These new strained intermediates display interesting reactivity leading to a butenolide, an alpha-hydroxyketone, a triol, an alpha-chloroketone, and an alpha-azidoketone.
The present invention provides a concise synthetic method for generating lactam-fused beta-lactones that feature, in some embodiments, a tertiary fused carbinol, quaternary carbons, and a reactive beta-lactone moiety available for further reactions. The present invention further provides compounds synthesized by this method as well as methods of using these compounds as inhibitors of the proteasome and fatty acid synthase.
NOVEL METHOD FOR THE ASYMMETRIC SYNTHESIS OF BETA-LACTONE COMPOUNDS
申请人:Smith Jeffrey W.
公开号:US20100173982A1
公开(公告)日:2010-07-08
The present invention features methods of treating a cancer in a subject by administering an effective amount of a beta-lactone to the subject. The invention also features methods of inhibiting angiogenesis in a subject by administering an effective amount of an inhibitor of fatty acid synthase to the subject. These methods can be used to treat a variety of cancers and other diseases and conditions. The invention also features methods of identifying beta-lactones and other compounds that can be used in the methods of the invention for the treatment of tumors, inhibition of angiogenesis, and the treatment of diseases and conditions that involve pathological angiogenesis. The invention also features methods of synthesizing beta-lactones and features novel beta-lactone compounds.