Absolute stereochemistries and total synthesis of (+)/(−)-macrosphelides, potent, orally bioavailable inhibitors of cell–cell adhesion
作者:Toshiaki Sunazuka、Tomoyasu Hirose、Noriko Chikaraishi、Yoshihiro Harigaya、Masahiko Hayashi、Kanki Komiyama、Paul A. Sprengeler、Amos B. Smith、Satoshi Ōmura
DOI:10.1016/j.tet.2005.02.022
日期:2005.4
and Kakisawa–Kashman modification of the Mosher NMR method to determine the complete relative and absolute stereochemistries of the (+)-macrosphelides A (+)-1 and B (+)-2. The stereostructure of (+)-2 was determined by chemical comparison with artificial (+)-2 from (+)-1. We also report the convergent total synthesis of (+)-1 and (+)-3, as well as their antipodes, utilizing an asymmetric dihydroxylation
在当前的研究中,我们使用了Mosher NMR方法的单晶X射线分析和Kakisawa-Kashman修饰来确定(+)-大碱基A(+)- 1和B(+ )-2。的立体结构(+) - 2 -通过用人工的(+)化学比较来确定2从(+) - 1。我们还报告了(+)- 1和(+)- 3以及它们的对映体的聚合全合成,利用不对称二羟基化引入手性和山口大环化以形成16元三内酯大环内酯。