Catalytic Synthesis of Trifluoromethylated Allenes, Indenes, Chromenes, and Olefins from Propargylic Alcohols in HFIP
作者:Florent Noël、Vuk D. Vuković、Jing Yi、Edward Richmond、Pavle Kravljanac、Joseph Moran
DOI:10.1021/acs.joc.9b02398
日期:2019.12.20
A general method to access CF3-substituted allenes from propargylic alcohols under Lewis acid catalysis in 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) as solvent is described. By tuning the reaction time and temperature, the obtained allenes rearrange to 1,3-biaryl-1-trifluoromethyl-1H-indenes. By tuning the structure of the propargylic alcohol substrates, a range of trifluoromethylated 2H-chromenes were
描述了一种在路易斯酸催化下,在1,1,1,3,3,3-六氟-2-丙醇(HFIP)中作为溶剂从炔丙醇中获得CF3取代的丙二烯的一般方法。通过调节反应时间和温度,获得的烯丙基重排为1,3-联芳基-1-三氟甲基-1H-茚。通过调节炔丙醇底物的结构,利用催化量的强布朗斯台德酸在HFIP中成功地合成了一系列三氟甲基化2H-色烯。因此,本方法对于合成许多潜在的药学上令人关注的新的三氟甲基化化合物非常有效,并且产生水作为唯一的化学计量副产物。