Syntheses of pseudoceramines A–D and a new synthesis of spermatinamine, bromotyrosine natural products from marine sponges
作者:J. Mikael Hillgren、Christopher T. Öberg、Mikael Elofsson
DOI:10.1039/c1ob06722b
日期:——
Herein we report the total syntheses of pseudoceramine A-D (2â5) and spermatinamine (1) isolated from the marine sponge Pseudoceratina sp. Direct acyl substitution of α-hydroxyiminoesters with amine nucleophiles was developed as a key transformation. The synthetic compounds confirm the reported structures and importantly gives access to non-symmetrical spermine based natural products carrying two different bromotyrosine building blocks. Our new synthesis of spermatinamine is two steps shorter and more efficient than the previously reported sequence.
在此,我们报告了从海洋海绵中分离出的假精胺 A-D(2â5)和精胺(1)的全合成。合成的化合物证实了所报道的结构,重要的是提供了含有两种不同溴酪氨酸结构单元的非对称精胺类天然产物。与之前报道的序列相比,我们的精胺新合成方法缩短了两个步骤,效率更高。