Total synthesis of myriocin and mycestericin D employing Rh(II)-catalyzed C H amination followed by stereoselective alkylation
作者:Narumi Noda、Hisanori Nambu、Kana Ubukata、Tomoya Fujiwara、Kiyoshi Tsuge、Takayuki Yakura
DOI:10.1016/j.tet.2016.12.066
日期:2017.2
stereoselectively to provide an oxathiazinane bearing a quaternary chiral center in high yield. Myriocin and mycestericin D were synthesized from a common synthetic intermediate. This route includes the first application of the Du Bois procedure for constructing a quaternary chiral center.
使用Du Bois Rh(II)催化的氨基磺酸氨基磺酸C H胺化反应和随后的烷基化作为关键步骤,可以实现myriocin和mycestericin D的全合成。在Rh 2(OAc)4存在下,氨基磺酸盐与PhI(OAc)2和MgO的反应以高收率得到了草噻嗪烷N,O-缩醛。ZnCl 2存在下,使用乙烯基溴化镁烷基化N,O-缩醛进行了立体选择,以高收率提供了具有季铵盐手性中心的草并恶嗪烷。十四烷霉素和mycestericin D是从常见的合成中间体合成的。此路线包括Du Bois程序在构建四元手性中心中的首次应用。