A practical and efficient method for the synthesis of .beta.-lactones
摘要:
This paper describes a convenient one-step preparation of beta-lactones based on the addition of thiol ester enolates to carbonyl compounds. Under the proper conditions the resulting aldolates undergo spontaneous cyclization to produce beta-lactones in good to excellent yield. The new beta-lactone synthesis provides access to 2-oxetanones with a variety of substituents and substitution patterns. In general, thiol ester enolates combine with carbonyl compounds to form the less sterically crowded beta-lactone diastereomers, and in some cases the reaction proceeds with excellent stereoselectivity. In conjunction with the stereospecific decarboxylation of beta-lactones, this chemistry also provides a very attractive approach to the synthesis of substituted alkenes.
Synthesis of allenes via thermal cycloreversion of .alpha.-alkylidene-.beta.-lactones
作者:Rick L. Danheiser、Yong Mi Choi、Maria Menichincheri、Eric J. Stoner
DOI:10.1021/jo00054a011
日期:1993.1
This paper describes the application of the solution-phase [2 + 2] cycloreversion of alpha-alkylidene-beta-lactones as a practical method for the generation of substituted allenes. Upon heating in dimethylformamide solution at 110-125-degrees-C, these unsaturated beta-lactone derivatives undergo decarboxylation to provide allenes in good to excellent yield. Alpha-alkylidene-beta-lactones are conveniently prepared via the phenylselenylation of beta-lactone enolates followed by oxidative elimination of the resulting alpha-phenylseleno derivatives. The beta-lactone starting materials are synthesized by the addition of thiol ester enolates to ketones and aldehydes according to our recently reported procedure.
Inhibition of fatty acid synthase by beta-lactones and other compounds for inhibition of cellular proliferation
申请人:——
公开号:US20040024050A1
公开(公告)日:2004-02-05
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.
[EN] INHIBITION OF FATTY ACID SYNTHASE BY BETA-LACTONES AND OTHER COMPOUNDS FOR INHIBITION OF CELLULAR PROLIFERATION<br/>[FR] INHIBITION DE SYNTHASE D'ACIDE GRAS PAR BETA-LACTONES ET PAR D'AUTRES COMPOSES DESTINES A INHIBER LA PROLIFERATION CELLULAIRE
申请人:BURNHAM INST
公开号:WO2003088975A1
公开(公告)日:2003-10-30
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.
A practical and efficient method for the synthesis of .beta.-lactones
作者:Rick L. Danheiser、James S. Nowick
DOI:10.1021/jo00003a047
日期:1991.2
This paper describes a convenient one-step preparation of beta-lactones based on the addition of thiol ester enolates to carbonyl compounds. Under the proper conditions the resulting aldolates undergo spontaneous cyclization to produce beta-lactones in good to excellent yield. The new beta-lactone synthesis provides access to 2-oxetanones with a variety of substituents and substitution patterns. In general, thiol ester enolates combine with carbonyl compounds to form the less sterically crowded beta-lactone diastereomers, and in some cases the reaction proceeds with excellent stereoselectivity. In conjunction with the stereospecific decarboxylation of beta-lactones, this chemistry also provides a very attractive approach to the synthesis of substituted alkenes.
SYNTHESIS OF b-LACTONES AND ALKENES VIA THIOL ESTERS: (E)-2,3-DIMETHYL-3-DODECENE
作者:Danheiser, Rick L.、Nowick, James S.、Lee, Janette H.、Miller, Raymond F.、Huboux, Alexandre H.、Mathre, David J.、Shinkai, Ichiro