Synthetic study on dolastatin 16: concise and scalable synthesis of two unusual amino acid units
作者:Taiki Umezawa、Akinori Sato、Yasuto Ameda、Loida O. Casalme、Fuyuhiko Matsuda
DOI:10.1016/j.tetlet.2014.11.054
日期:2015.1
A convenient and scalable synthesis of two unusual amino acid units found in dolastatin 16, dolaphenvaline, and dolamethylleuine, is described. Dolastatin 16, which was first isolated from the sea hare Dolabella auricularia by Pettit, exhibits not only strong inhibition of growth for a variety of human cancer cell lines but also potent antifouling activity against the larvae of the barnacle Balanus
描述了一种便捷且可扩展的合成方法,可合成在dolastatin 16,dolaphenvaline和dolamethylleuine中发现的两个不同的氨基酸单元。Dolastatin 16是最早由Pettit从海兔Dolabella auricularia中分离出来的,不仅表现出对多种人类癌细胞系生长的强烈抑制作用,而且还具有针对藤壶Balanus amphitrite幼虫的有效防污活性。合成的关键要素是有机催化曼尼希反应,可在氨基酸单元中以几乎完全的对映和非对映选择性构建两个连续的立体中心。