Calcium-Catalyzed Friedel-Crafts Alkylation at Room Temperature
作者:Meike Niggemann、Matthias J. Meel
DOI:10.1002/anie.200907227
日期:2010.5.10
A novel calcium catalyst was found to efficiently functionalize electron‐rich arenes with secondary and tertiary benzylic, propargylic, and allylic alcohols under very mild reaction conditions. The new catalyst system significantly enlarges the scope of the reaction, which was previously limited except for the few examples with secondary benzylicalcohols.
Rearrangement reactions of cycloalkenyl phenol and naphthyl ethers and the acid-catalyzed cyclization of the resulting product were investigated. Claisen rearrangement afforded 2-substituted phenol and naphthol derivatives. Combined Claisen and Cope rearrangement resulted in the formation of 4-substituted phenol and naphthol derivatives. In the case of cycloocthylphenyl ether the consecutive Claisen
Tailoring aqueous solvents for organic reactions: Heck coupling reactions in high temperature water
作者:Liz U. Gron、Amanda S. Tinsley
DOI:10.1016/s0040-4039(98)02323-5
日期:1999.1
High temperature water is demonstrated to be an effective solvent for Heck coupling reactions of aromatic halides with cyclic alkenes without the addition of co-solvents or specialized ligands. Reactions in the presence of LiCl and quaternary ammonium salts indicate that the reaction takes place in the aqueous phase. (C) 1998 Elsevier Science Ltd. All rights reserved.
Kozlikovskii, Ya. B.; Koshchii, V. A.; Nesterenko, S. A., Journal of Organic Chemistry USSR (English Translation), 1985, vol. 21, p. 702 - 705
作者:Kozlikovskii, Ya. B.、Koshchii, V. A.、Nesterenko, S. A.