Sodium Hydroxide → HCID 131718274, compound

Participants

Reaction Conditions

Reaction Steps

Methyl (1S, 4aS, 7S, 7aR)-1-[1-(ethoxy)ethoxy]-7-methyl-1,4a,5,6,7,7a-hexahydrocyclopenta[c]pyran-4carboxylate (15.0 g, 0.053 mol) obtained in Example 4 was dissolved in 250 ml of anhydrous tetrahydrofuran, and the reaction mixture was cooled to -50° C., 88 ml of diisobutylaluminum hydride (1.5 mol toluene solution) was added dropwise to this solution. After the reaction mixture was stirred at the same temperature for 3 hours, 10 ml of acetone was added and the solution was further stirred for 20 minutes. Furthermore, a 3% aqueous sodium hydroxide solution was added dropwise and the solution was stirred for 1 hour. After magnesium sulfate was added, the reaction solution was stirred further for 20 minutes, and after insoluble matters were removed by celite filtration, the solution was concentrated under a reduced pressure. The resulting colorless oily substance, i.e., (1S, 4aS, 7S, 7aR)-1-[1-(ethoxy)ethoxy]-1,4 a,5,6,7,7a-hexahydro-4-(hydroxymethyl)-7methylcyclopenta[c]pyran (12.1 g, yield=90.2%) had the following physicochemical properties:

Provenance & Evidence