High Stereoselective Preparation of O-Protected 2-Trifluoromethyl 3-Bromoallylic Alcohols from 1,1-Dibromo-1-alkenes
摘要:
A highly stereoselective lithium-bromine exchange reaction of 2-trifluoromethyl-3,3-dibromoallylic alcohols is described. (E)- and (2)-2-trifluoro-3-bromoallylic alcohols were obtained in THF and hexane, respectively. The lithium carbenoid intermediate was stable even at -40 degreesC and could be trapped by various electrophiles to afford functionalized 2-trifluoromethyl-3-bromoallylic alcohols.
High Stereoselective Preparation of O-Protected 2-Trifluoromethyl 3-Bromoallylic Alcohols from 1,1-Dibromo-1-alkenes
摘要:
A highly stereoselective lithium-bromine exchange reaction of 2-trifluoromethyl-3,3-dibromoallylic alcohols is described. (E)- and (2)-2-trifluoro-3-bromoallylic alcohols were obtained in THF and hexane, respectively. The lithium carbenoid intermediate was stable even at -40 degreesC and could be trapped by various electrophiles to afford functionalized 2-trifluoromethyl-3-bromoallylic alcohols.