(+)-proto-Quercitol, a natural versatile chiral building block for the synthesis of the α-glucosidase inhibitors, 5-amino-1,2,3,4-cyclohexanetetrols
作者:Sumrit Wacharasindhu、Wisuttaya Worawalai、Wimolpun Rungprom、Preecha Phuwapraisirisan
DOI:10.1016/j.tetlet.2009.02.153
日期:2009.5
diastereomerically pure 5-amino-1,2,3,4-cyclohexanetetrols (6 and 11) and quercitol derivatives from naturally available (+)-proto-quercitol (1) is described. The stereochemistry of 1 is perfectly set up for regioselective protection of the hydroxy group which was further functionalized into the target aminocyclitol in a straightforward manner. The present approach provides a protocol for preparing aminocyclitols
描述了由天然可得的(+)-原-槲皮醇(1)有效合成非对映体纯的5-氨基-1,2,3,4-环己烷四醇(6和11)和槲皮醇衍生物。立体化学1的建立是为了对羟基进行区域选择性保护,该羟基以直接的方式进一步官能化成目标氨基环糖醇。本方法提供了用于大量制备氨基环醇的方案。另外,使用改进的Mosher方法解决了(+)-原-槲皮醇的绝对立体化学。在合成的氨基环糖醇中,有11种可能通过IC抑制α-葡萄糖苷酶50值12.5μM,其比标准降糖药,阿卡波糖的大45倍的®。