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 |
葡萄糖酸内酯 | D-Glucono-1,5-lactone | 90-80-2 | C6H10O6 | 178.142 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (2R,3S,4R)-1,2:3,4-bis(O-isopropylidene)-6-hexanal-1,2,3,4-tetrol | 71769-41-0 | C12H20O5 | 244.288 |
—— | methyl 2,3-dideoxy-5,6-O-isopropylidene-D-erythro-hexonate | 127553-90-6 | C10H18O5 | 218.25 |
—— | (5S,1'S)-5-{1',2'-dihydroxy-1',2'-O-isopropylidene-ethyl}-tetrahydrofuran-2-one | 128856-61-1 | C9H14O4 | 186.208 |
—— | methyl (3R,4R)-3,4-isopropylidenedioxyhex-5-ynoate | 1404583-29-4 | C10H14O4 | 198.219 |
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.