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 |
—— | 1,2:3,4:5,6-tri-O-isopropylidene-δ-gluconolactone | 52492-60-1 | C15H24O7 | 316.351 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl (2R)-2-[(4S,5R)-5-[(1R)-1,2-dihydroxyethyl]-2,2-dimethyl-1,3-dioxolan-4-yl]-2-phenylmethoxyacetate | 261962-11-2 | C17H24O7 | 340.373 |
—— | (2R)-2-[(4S,5R)-5-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-dimethyl-1,3-dioxolan-4-yl]-2-phenylmethoxyacetaldehyde | 639476-02-1 | C19H26O6 | 350.412 |
—— | 2-O-benzyl-3,4:5,6-di-O-isopropylidene-D-glucitol | 276238-73-4 | C19H28O6 | 352.428 |
—— | (4R,5S,6R,7R,8R)-N4-benzyl-5-benzyloxy-6,7:8,9-di-O-isopropylidene-1-nonene | 639476-04-3 | C29H39NO5 | 481.632 |
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.