Synthetic study of tautomycin. Part 2: Synthesis of Ichihara's fragment based on regioselective enzymatic acetylation of complex molecule
作者:Yusuke Ishii、Shinji Nagumo、Takayuki Arai、Masami Akuzawa、Norio Kawahara、Hiroyuki Akita
DOI:10.1016/j.tet.2005.10.013
日期:2006.1
Formal synthesis of tautomycin, which inhibits type 1 and type 2A protein phosphatases, was achieved. Spiroketal diol 21 was synthesized from alcohol 2 or 11. The regioselective enzymatic acetylation of 21 with the lipase ‘Amano PS’ gave monoacetate 23 in 90% yield, which was converted into Ichihara's intermediate 31 based on Julia coupling and Wittig homologation.
实现了互变异构体的正式合成,它可以抑制1型和2A型蛋白磷酸酶。螺二元醇21由醇2或11合成。用脂肪酶“ Amano PS”对21进行区域选择性酶促乙酰化,以90%的收率得到单乙酸酯23,基于Julia偶联和Wittig同源性将其转化为Ichihara的中间体31。