Chemoselective<i>O</i>-Benzylation of the Propargylic Hydroxy Group in Polyols
作者:Ji Ho Lee、Chang Ho Oh
DOI:10.1002/ejoc.201201086
日期:2012.10
the highly chemoselective benzylation of propargylichydroxygroups in the presence of other hydroxygroups under very usual conditions involving benzyl bromide and sodium hydroxide in DMF at room temperature. This methodology has a high synthetic utility for the selective protection of hydroxygroups at the propargylic position among various other hydroxygroups in complex molecules.
Gold-Catalyzed Efficient Preparation of Linear α-Iodoenones from Propargylic Acetates
作者:Meng Yu、Guozhu Zhang、Liming Zhang
DOI:10.1021/ol070637o
日期:2007.5.1
Au(PPh3)NTf2 is needed to convert readily accessible propargylic acetates into versatile linear alpha-iodoenones in good to excellent yields. This reaction is easy to execute and has broad substrate scope. Good to excellent Z-selectivities are observed in the cases of aliphatic propargylic acetates derived from aldehydes.
Gold-catalyzed efficient preparation of linear α-haloenones from propargylic acetates
作者:Meng Yu、Guozhu Zhang、Liming Zhang
DOI:10.1016/j.tet.2008.11.107
日期:2009.2
Versatile linear α-iodo- and α-bromoenones are prepared efficiently from readily accessible propargylic acetates using 2 mol % of Au(PPh3)NTf2. This reaction is easy to execute and has broad substrate scope. Good to excellent Z-selectivities are observed in the cases of propargylic acetates derived from aliphatic aldehydes.