4-(furan-2-yl)but-3-en-2-one

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: furfurylidene acetone, 5-methyl-2-furfurylidene, acetone,

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of sodium ethoxide (from 2.3 g. sodium and dry ethanol 35 ml.) was added slowly diethyl malonate (14 g.). After the addition the mixture was heated under reflux for 1 minute, cooled and then treated with 4-(2-furyl)-3-buten -2-one (13 g.). After heating under reflux for 17 hrs. and cooling, the precipitated sodium enolate salt (of formula III) was collected by filtration, washed with acetone and dissolved in water. The solution was acidified with 2N-sulphuric acid (to convert the enolate salt to the corresponding dione II) and extracted with dichloromethane. After washing the organic layer with water and drying over sodium sulphate, removal of solvents under reduced pressure afforded ethyl 2,4-dioxo-6-(2-furyl)-cyclohexanecarboxylate. After the addition the mixture was heated under reflux for 1 minute cooled After heating under reflux for 17 hrs and cooling the precipitated sodium enolate salt (of formula III) was collected by filtration washed with acetone dissolved in water extracted with dichloromethane After washing the organic layer with water drying over sodium sulphate, removal of solvents under reduced pressure

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: furfurylidene acetone, 5-methyl-2-furfurylidene, acetone,

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: furfurylidene acetone, 5-methyl-2-furfurylidene, acetone,