反应详情

reacting a 3-benzyloxy-4-hydroxy-5-(2-hydroxyethyl)-2(5H)-furanone of the formula, ##STR14## wherein Bn is as hereinbefore defined with one equivalent of BnBr and one equivalent of triethlyamine in THF for 5 hours at 65--C to provide 3,4-dibenzyloxy-5-(2-hydroxyethyl)-2(5H)-furanone of the formula, ##STR15## wherein Bn is as hereinbefore defined;