Acetal-bond Cleavage of 4,6-O-Alkylidenehexopyranosides by Diisobutylaluminium Hydride and by Lithium Triethylborohydride-TiCl<sub>4</sub>
作者:Tetsuhiro Mikami、Hiroyuki Asano、Oyo Mitsunobu
DOI:10.1246/cl.1987.2033
日期:1987.10.5
Regioselective acetal-bond cleavage of 4,6-O-benzylidene-and 4,6-O-(4-methoxybenzylidene)-α-d-altropyranosides by DIBAL or Li(C2H5)3BH–TiCl4 is described. The sense of regioselectivity could be controlled by suitable choice of the protecting group of hydroxyl function at C-3. Reduction of 4,6-O-alkylideneglucopyranosides by DIBAL is also examined.
描述了使用DIBAL或Li(C2H5)3BH–TiCl4对4,6-O-苄叉-和4,6-O-(4-甲氧基苄叉)-α-d-altropyranosides进行区域选择性的醚键断裂。区域选择性的方向可以通过合适选择C-3羟基功能的保护基团来控制。还研究了使用DIBAL对4,6-O-烷基叉葡萄糖吡喃糖的还原。