Directed Synthesis of All Four Pure Stereoisomers of the <i>N</i>,<i>C</i>-Coupled Naphthylisoquinoline Alkaloid Ancistrocladinium A
作者:Raina Seupel、Barbara Hertlein-Amslinger、Tanja Gulder、Philipp Stawski、Marcel Kaiser、Reto Brun、Gerhard Bringmann
DOI:10.1021/acs.orglett.6b03480
日期:2016.12.16
The first preparation of the N,C-coupled naphthylisoquinoline alkaloid ancistrocladinium A and its likewise naturally occurring minor atropisomer, in an atropisomerically pure form, is described. The synthesis succeeded by resolution of the already rotationally hindered, and thus atropo-diastereomeric acetamide precursors, which were then, without major loss of stereochemical information, cyclized
描述了N,C-偶联的萘基异喹啉碱生物碱Atrotrocladinium A及其类似天然存在的次要阻转异构体的第一制备,其形式为阻转异构体纯形式。合成通过拆分已经旋转受阻的阻转非对映异构的乙酰胺前体而成功,然后将其在没有重大立体化学信息损失的情况下环化成相应的靶分子。该策略同样以立体化学纯的形式应用于区域异构产物顺反子草D的首次合成。