Lewis Acid Catalyzed Regiospecific Cross-Dehydrative Coupling Reaction of 2-Furylcarbinols with β-Keto Amides or 4-Hydroxycoumarins: A Route to Furyl Enols
Lewis acid-catalyzed directly dehydrative carbon-carbon bond formation reaction of 2-furylcarbinols with beta-keto amides provides a straight method for regioselective synthesis of (Z)-furyl-enols. Moreover, this Lewis acid-catalyzed cross-coupling reaction can be extended to an interesting heterocyclic version, featuring a functionalized 3-furyl-4-hydroxycoumarins synthesis.
A new synthesis of 5-methylene-2(5H)-furanone derivatives
作者:Roberto Antonioletti、Maurizio D'Auria、Antonella De Mico、Giovanni Piancatelli、Arrigo Scettri
DOI:10.1016/s0040-4020(01)88810-4
日期:1984.1
5-methylene-2(5H)-furanonederivatives are easily obtained by treatment of tertiary 2-furylcarbinols with pyridinium dichromate in dimethylformamide solution. Through this procedure, a natural product, the thiophene lactone isolated from Chamaemelum Nobile L., has been synthesized.