作者:Ian Cumpstey
DOI:10.1016/j.tetlet.2005.07.054
日期:2005.9
cyclohex-5-ene-1,2,3,4-tetrol, a precursor of the α-glucosidase inhibitor, valienamine, was synthesised in eight steps from tetrabenzyl glucose. The key steps were the selective protection of an open-chain diol, and the formation of the cyclohexene ring by ring-closing metathesis with the trisubstituted olefin of valienamine correctly in place.
(1 R,2 S,3 S,4 R)-2,3,4-三-O-苄基-5-(苄氧基甲基)-环己-5-烯-1,2,3,4-四醇α-葡萄糖苷酶抑制剂缬氨酸胺是由四苄基葡萄糖分八步合成的。关键步骤是对开链二醇的选择性保护,以及通过正确地与缬氨酸胺的三取代烯烃进行开环复分解而形成环己烯环。