Protecting groups that incorporate a 4-pentenyl acetal moiety can be cleaved under neutral conditions1
作者:Zufan Wu、D.R Mootoo、Bert Fraser-Reid
DOI:10.1016/s0040-4039(00)82394-1
日期:1988.1
their 4-pentenyloxymethyl (POM) ethers, and regenerated therefrom by treatment with NBS in CH3CN/H2O. Ketones and aldehydes are converted into ketals by reaction with 5-hexen-1,2-diol. Regeneration occurs by treatment with NBS or Hg(OAc)2 in aqueous media. Vicinal diols are converted into acetals by reaction with 4-pentenal. Deprotection is achieved by sequential oxidative and reductive steps.
可以将醇作为它们的4-戊烯氧基甲基(POM)醚进行保护,并通过在CH 3 CN / H 2 O中用NBS处理从中再生。酮和醛通过与5-hexen-1,2-二醇反应转化为缩酮。通过在水性介质中用NBS或Hg(OAc)2处理进行再生。通过与4-戊烯反应,将邻二醇转化为缩醛。脱保护通过顺序的氧化和还原步骤来实现。