3-f]indolizidinone obtained from biosourced reagents even at multigram-scale was used as an advanced building-block with up to five points of chemical diversification. This resulted in the sequential synthesis of a series of mono-, di- and tetra-hydroxyfuranoindolizidines belonging to a very scarce and elaborate tetrahydrofuran-fused indolizidine family with up to six controlled stereogenic centers. These sequences
从
生物来源的试剂中获得的二氢
呋喃[2,3 - f ]
吲哚齐酮即使在数克级也被用作具有多达五个
化学多样化点的高级构件。这导致了一系列单、二和四羟基
呋喃中氮
茚的连续合成,这些产品属于非常稀有和精细的
四氢呋喃稠合中氮
茚家族,具有多达六个受控的立体中心。这些序列包括,除其他外,非对映选择性烯烃环氧化、立体选择性
环氧化物开环成
四氢呋喃反式二醇、它们作为酯或
丙酮化物的保护,以及内酰胺羰基还原,最后是
乙酸酯或
丙酮化物脱保护。