Synthesis of furanone-Based natural product analogues with quorum sensing antagonist activity
摘要:
The synthesis of 5- and 3-(1'-hydroxyalkyl)-substituted 5H-furan-2-ones 4a-d and 8a-d as well as 5-alkylidene-5H-furan-2-ones 5a-d is described. A study of the structure-activity relationship of these furanone-based natural product analogues towards two different quorum sensing systems is reported. Although the synthesized compounds are not as potent quorum sensing inhibitors as some natural counterparts and a synthetic analogue hereof, interesting structure-activity relationships are seen. (C) 2003 Elsevier Science Ltd. All rights reserved.
A variety of 4-substituted butenolides were prepared utilizing 2-acetoxyfuran as a key intermediate which can be easily synthesized by anodic oxidation of furan.
Asymmetric Vinylogous Aldol Reaction of Silyloxy Furans with a Chiral Organic Salt
作者:Ravi P. Singh、Bruce M. Foxman、Li Deng
DOI:10.1021/ja103331t
日期:2010.7.21
significance there is a general lack of asymmetric vinylogous aldolreactions that tolerate variations of both the silyloxy furans and aldehydes. We have developed a newchiral organic catalyst based on a carboxylate-ammonium salt preparedfrom a thiourea-amine and a carboxylic acid. This newcatalyst enabled us to develop an efficient asymmetric vinylogous aldolreaction of unprecedented scope with respect
A study of the structure-cytotoxic activity of the acetogenin of Annonaceae, muricatacin 1, is reported. Indeed, muricatacin 1 has shown promising antitumoral activity. Therefore several 5-hydroxy-4-alkanolides were prepared and then tested against KB and VERO cell lines. A few other analogues were synthesized and tested against both cell lines. Thus this work allowed us to better determine the pharmacophore of the molecule and to propose muricatacin 1 instead of a more complicated acetogenin of Annonaceae as a lead compound in the search for new antineoplastic agents.
The first organocatalytic addition of 2-trimethylsilyloxyfuran to carbonyl compounds: hydrogen-bond catalysis in γ-butenolides synthesis
作者:Margherita De Rosa、Lucia Citro、Annunziata Soriente
DOI:10.1016/j.tetlet.2006.09.143
日期:2006.11
This letter describes the first example of diastereoselective 'organocatalyzed' synthesis of the butenolide products substituted at the gamma-position by a chain bearing hydroxyl groups. The urea-derivative 4 has proved to be an efficient catalyst for the addition of the commercial TMSOF to carbonyl compounds under solvent-free conditions. The reaction conditions and generality of the procedure have been examined. (c) 2006 Elsevier Ltd. All rights reserved.