中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl 3,4:5,6-di-O-isopropylidene-D-gluconate | 114743-85-0 | C13H22O7 | 290.313 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (4S,5S)-5-[(1S)-1-[tert-butyl(dimethyl)silyl]oxypentyl]-2,2-dimethyl-1,3-dioxolane-4-carbaldehyde | 1054647-40-3 | C17H34O4Si | 330.54 |
—— | 5-(tert-butyldimethylsilanyloxy)-5-{5-[1-(tert-butyldimethylsilanyloxy)-pentyl]-2,2-dimethyl-[1,3]dioxolan-4-yl}-pent-2-enoic acid methyl ester | 769957-66-6 | C28H56O6Si2 | 544.92 |
—— | 5-(tert-butyldimethylsilanyloxy)-5-{5-[1-(tert-butyldimethylsilanyloxy)-pentyl]-2,2-dimethyl-[1,3]dioxolan-4-yl}-pent-2-ynoic acid methyl ester | 769957-65-5 | C28H54O6Si2 | 542.904 |
A simple and efficient protocol is described for the regioselective hydrolysis of terminal isopropylidene ketal protection in carbohydrate derivatives 1a - 11a. It uses either CoCl2 · 2H2O in acetonitrile or InCl3 in methanol at temperatures ranging from 50 to 60 °C. The low cost of CoCl2·2H2O along with its requirement in catalytic quantities offers a great advantage for the multi-gram scale reaction.