Synlett, Table of Contents Synlett 2014; 25(12): 1713-1716DOI: 10.1055/s-0034-1378276 letter © Georg Thieme Verlag Stuttgart · New York Decarboxylative Knoevenagel-Type Reactions on Tetronamides: Synthesis of 5-Ylidene-4-Amino-2(5H)-Furanones Alexandre Ear a Sorbonne Universités. UPMC Univ Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, 75005 Paris, France Email: luc.dechoux@upmc.fr b CNRS UMR 8232, Institut Parisien de Chimie Moléculaire, 75005 Paris, France , Valérie Toum a Sorbonne Universités. UPMC Univ Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, 75005 Paris, France Email: luc.dechoux@upmc.fr b CNRS UMR 8232, Institut Parisien de Chimie Moléculaire, 75005 Paris, France , Serge Thorimbert a Sorbonne Universités. UPMC Univ Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, 75005 Paris, France Email: luc.dechoux@upmc.fr b CNRS UMR 8232, Institut Parisien de Chimie Moléculaire, 75005 Paris, France , Luc Dechoux* a Sorbonne Universités. UPMC Univ Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, 75005 Paris, France Email: luc.dechoux@upmc.fr b CNRS UMR 8232, Institut Parisien de Chimie Moléculaire, 75005 Paris, France › Author Affiliations Recommend Article Abstract Buy Article All articles of this category Abstract A detailed account regarding the synthesis of 5-ylidene-2(5H)-furanones is given. The key step is a decarboxylative Knoevenagel-type reaction of tetronamides with various α-functionalized aldehydes. The synthesis of protected basidalin is presented. Key words Key wordsKnoevenagel–Doebner reaction - β-enaminoesters - tetronamides - 4-amino-2(5H)-furanones - basidalin Full Text References References and Notes 1a Schlessinger RH, Yu YJ. J. Am. Chem. 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