Intramolecular [1,4]-<i>S</i>- to<i>O</i>-Silyl Migration: A Useful Strategy for Synthesizing<i>Z</i>-Silyl Enol Ethers with Diverse Thioether Linkages
作者:Changzhen Sun、Yuebao Zhang、Peihong Xiao、Hongze Li、Xianwei Sun、Zhenlei Song
DOI:10.1021/ol403709g
日期:2014.2.7
migration has been used to form silylenolethers with Z-configurational control. The silyl migration also creates a new anion center at sulfur, which can subsequently react with electrophiles to generate Z-silyl enolethers with diverse thioether linkages. The synthetic utility of this pathway was demonstrated by modifying the Z-silyl enolethers with aldehydes via a Mukaiyama aldol reaction or Prins
As an extension of previously conducted studies on developing an anti-Alzheimer's disease agent, denosomin (1-deoxy-24-norsominone, an artificial inducer of neurite elongation), derivatives were designed and synthesized based on the hypothesis that our denosomin would exhibit axonal extension activity via a 1,25D(3)-membrane-associated, rapid response steroid-binding protein (1,25D(3)-MARRS) pathway. The biological assay revealed that the hybridization of characteristic delta-lactone in denosomin and the triene moiety in VD3 was effective to enhance the nerve re-extension activity in amyloid beta (A beta)-damaged neurons.