Tetrahydrofuran → HCID 23155408, compound

Participants

Reaction Conditions

Reaction Steps

A THF solution (2.0 ml) containing the compound (24.3 mg) obtained in Example 7-7 was added with a 1 mol/l borane-THF complex/THF solution (0.41 ml). The whole was refluxed under heating for 16 hours. After having been cooled to 0° C., the solution was added with methanol to stop the reaction and concentrated. The residue was added with a 1 mol/l hydrochloric acid (4.0 ml) and the whole was refluxed under heating for 3 hours. After having been left standing for cooling, the resultant was added with a 1 mol/l sodium hydroxide aqueous solution (5 ml) and the whole was subjected to extraction with chloroform. The organic layer was washed with a saturated aqueous sodium hydrogen carbonate solution and dried with anhydrous sodium sulfate. The residue obtained by distilling the solvent off was purified through silica gel column chromatography (chloroform/methanol), thereby obtaining the subject compound (12.5 mg) as a colorless oily substance.

Provenance & Evidence