Reaction of Active Methylene Compounds with α-Fluoroalkyl Ketones or Esters: A Convenient Synthesis of 4-Trifluoromethylpyridines and meta-Trifluoromethylphenols
Regioselective [3+3] Cyclization of 1,3-Bis(silyloxy)buta-1,3-dienes with 1,1,1-Trifluoro-4-(silyloxy)alk-3-en-2-ones: New and Convenient Synthesis of Functionalized 5-Alkyl-3-(trifluoromethyl)phenols
作者:Stefan Büttner、Alina Bunescu、Sebastian Reimann、T. H. Tam Dang、Thomas Pundt、Renske Klassen、Andreas Schmidt、Nazken K. Kelzhanova、Zharylkasyn A. Abilov、Tariel V. Ghochikyan、Ashot S. Saghiyan、Alexander Villinger、Helmut Reinke、Anke Spannenberg、Peter Langer
DOI:10.1002/hlca.201200056
日期:2013.1
Functionalized 5‐alkyl‐3‐(trifluoromethyl)phenols were prepared by formal [3+3] cyclization of 1,3‐bis(silyloxy)buta‐1,3‐dienes with 1,1,1‐trifluoro‐4‐(silyloxy)alk‐3‐en‐2‐ones derived from 1,1,1‐trifluoroalkane‐2,4‐diones. The latter were prepared by condensation of the dianion of 1,1,1‐trifluoropentane‐2,4‐dione with alkyl halides.
Regioselective synthesis of 2-acetyl- and 2-alkoxycarbonyl-3-(trifluoromethyl)phenols by [3+3] cyclization of 1,3-bis-silyl enol ethers with 4-ethoxy- and 4-silyloxy-1,1,1-trifluoroalk-3-en-2-ones
2-Acetyl- and 2-alkoxycarbonyl-3-(trifluoromethyl)phenols were prepared by [3+3] cyclization of 1,3-bis-silylenolethers with 4-ethoxy- and 4-silyloxy-1,1,1-trifluoroalk-3-en-2-ones.
Aromatic annelation. II. An efficient synthesis of meta-fluoroalkyl phenols
作者:Hui-Ping Guan、Chang-Ming Hu
DOI:10.1016/0022-1139(96)03407-0
日期:1996.5
An efficientsynthesis of polysubstituted meta-fluoroalkylphenols through an intramolecular aldol condensation of certain fluoroalkyl-containing 1,5-dicarbonyl compounds is described.