Formaldehyde → HCID 46220204, compound

Participants

Reaction Steps

Compound 1 (4.00 g, 6.67 mmol) obtained in Example 1 was dissolved in 1,2-dichloroethane (50 mL) and methanol (50 mL), and stirred at room temperature for 1 hour after adding formaldehyde (4.96 mL, 66.7 mmol) and sodium triacetoxyborohydride (Acros Organics; 7.06 g, 33.3 mmol). The reaction mixture was further stirred at room temperature for 2.5 hours after adding sodium triacetoxyborohydride (Acros Organics; 7.06 g, 33.3 mmol). The aqueous layer was extracted with ethyl acetate after adding a saturated sodium bicarbonate aqueous solution to the reaction solution. The organic layer was washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure after filtration. The resulting residue was purified by silica gel column chromatography (chloroform/methanol=100/0 to 95/5) to give compound 10 (3.99 g, 97.4%).

Provenance & Evidence