First total synthesis of the natural product 1,3-di-O-galloyl-4,6-O-(S)-hexahydroxydiphenoyl-β-d-glucopyranoside
作者:Karamali Khanbabaee、Mathias Großer
DOI:10.1016/s0040-4020(01)01210-8
日期:2002.2
A straightforward synthesis of the natural product 1,3-di-O-galloyl-4,6-O-(S)-hexahydroxy-diphenoyl-β-d-glucopyranoside (7) was achieved based on a regio- and stereoselective galloylation of the 1,3-diol derivative of d-glucopyranose 2 to the β-d-glucopyranoside 3. Subsequent acylation of monoester 3 to the diester 4 followed by the removal of the benzylidene protecting group led to the formation of
天然产物1,3-二-O -galloyl-4,6- O-(S)-六羟基-二苯甲酰基-β-d-吡喃葡萄糖苷(7)的直接合成是基于对甲氧基的区域和立体选择性d-吡喃葡萄糖2的1,3-二醇衍生物为β-d-吡喃葡萄糖苷3。随后将单酯3酰化为二酯4,然后除去亚苄基保护基团,导致形成d-吡喃葡萄糖苷5的相应4,6-二醇衍生物。(rac)的进一步双酯化)-d-吡喃葡萄糖苷5的适当取代的4,6-二醇衍生物的)-六苄氧基二苯甲酸使我们能够组装靶7的碳骨架。作为目标化合物前体的四酯6在钯/炭上的氢解反应得到天然产物7。