Stereoselective synthesis of the 5′-aminofuranoside part of polyoxins via (3,3)-sigmatropic rearrangement of allylic thiocyanates
作者:Jozef Gonda、Miroslava Martinková、Martin Walko、Eva Zavacká、Miloš Buděšı́nský、Ivana Cı́sařová
DOI:10.1016/s0040-4039(01)00735-3
日期:2001.6
A new and stereoselective route for the synthesis of the benzyl 5-(R)-N-Cbz-5,6-dideoxy-2,3-O-isopropylidene-β-d-ribo-hept-6-enfuranoside 5e and 5-(R)-N-acetyl-5,6-dideoxy-1,3-O-isopropylidene-β-d-ribo-hept-6-enfuranoside 12 as useful protected precursors of the 5′-aminofuranoside part of polyoxins is presented. The key-step involves diastereoselective introduction of the amino group at C-5 of the
为苄基5-(合成一个新的和立体路线- [R )- ñ -Cbz-5,6-二脱氧-2,3- ö异亚丙基β-D-核糖-庚-6- enfuranoside 5E和5-提出了(R)-N-乙酰基-5,6-二脱氧-1,3- O-异亚丙基-β-d-核糖-庚基-6-呋喃糖苷12,作为多恶英的5'-氨基呋喃糖苷部分的有用的受保护前体。关键步骤涉及通过相应的烯丙基硫氰酸酯的(3,3)-σ重排,对核糖和木糖的C-5处的非对映选择性引入。