Dimethylformamide → Methyl 2-C-methyl-2,3,5-tris-O-(phenylmethyl)-α-D-ribofuranoside

Participants

Reaction Steps

1.2 g of sodium hydride was added to an N,N-dimethylformamide solution of 7.2 g of (2S,3R,4R,5R)-4-(benzyloxy)-5-((benzyloxy)methyl)-2-methoxy-3-methyloxolan-3-ol, and thereafter, 5.1 g of benzyl bromide was added dropwise to the mixture at a temperature of 15° C. or lower. The obtained mixture was stirred at room temperature for 1.5 hours. Thereafter, 200 mL of water and 200 mL of ethyl acetate were added to the reaction mixture. The organic layer was fractionated, and it was successively washed with 200 mL of 1 mol/L hydrochloric acid and 200 mL of a saturated sodium chloride aqueous solution. The solvent was distilled away under reduced pressure, so as to obtain 9.0 g of (2S,3R,4R,5R)-3,4-bis(benzyloxy)-5-((benzyloxy)methyl)-2-methoxy-3-methyloxolane in the form of a colorless oily product.

Provenance & Evidence