Total Synthesis of Hyacinthacines B<sub>3</sub>, B<sub>4</sub>, and B<sub>5</sub> and Purported Hyacinthacine B<sub>7</sub>, 7-<i>epi</i>-Hyacinthacine B<sub>7</sub>, and 7a-<i>epi</i>-Hyacinthacine B<sub>3</sub> from a Common Precursor
作者:Kongdech Savaspun、Christopher W. G. Au、Stephen G. Pyne
DOI:10.1021/jo5005923
日期:2014.5.16
2-amino alcohol precursor is described. These syntheses confirmed that the proposed structures and absolute configurations of hyacinthacines B3, B4, and B5 were correct and disclosed that the proposed structure of hyacinthacine B7 was incorrect. Our synthetic and spectroscopic studies suggest that the natural hyacinthacines B5 and B7 are the same compounds; however, without access to authentic samples
hyacinthacines B的总合成3,B 4和B 5和声称hyacinthacine乙7,7-外延-hyacinthacine乙7,和7A-外延-hyacinthacine乙3从一个共同反-1,2-氨基醇的前体被描述。这些合成证实了葫芦素B 3,B 4和B 5的拟议结构和绝对构型是正确的,并公开了葫芦素B 7的拟议结构是不正确的。我们的合成和光谱研究表明,天然风信子素B 5B 7为相同的化合物。但是,如果不能获得真实的样品,就不能明确地证明这一点。