Palladium(II)-Catalyzed Michael-Type Hydroarylation of Nitroalkenes Using Aryltins and Sodium Tetraarylborates
作者:Toshiyuki Ohe、Sakae Uemura
DOI:10.1246/bcsj.76.1423
日期:2003.7
variety of aryltin compounds and sodium tetraarylborates can be employed for Michael-type hydroarylation reactions of nitroalkenes to afford β-arylnitroalkanes in moderate to good yields in the presence of either LiCl, MgCl2, or CaCl2 and a catalytic amount of palladium(II) salt (0.05 molar amount) in acetic acid. Results show that 50–70% of aryl groups out of all in these arylcompounds can be transferred
Lithium perchlorate accelerated Friedel–Crafts addition of furans to β-nitrostyrenes
作者:Martin J. Stoermer、Hans-Matthias Richter、Dieter E. Kaufmann
DOI:10.1016/j.tetlet.2013.10.018
日期:2013.12
The Friedel-Crafts alkylation of furans by the Michael acceptor, beta-nitrostyrene, is greatly accelerated by the use of the Lewis acid catalyst and solvent, 5 M lithium perchlorate in diethyl ether (LDPE). Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
CAMPBELL M. M.; COSFORD N.; LI ZONGLI; SAINSBURY M., TETRAHEDRON, 43,(1987) N 6, 1117-1122
作者:CAMPBELL M. M.、 COSFORD N.、 LI ZONGLI、 SAINSBURY M.
DOI:——
日期:——
Boosting Conjugate Addition to Nitroolefins Using Lithium Tetraorganozincates: Synthetic Strategies and Structural Insights
作者:Marzia Dell'Aera、Filippo Maria Perna、Paola Vitale、Angela Altomare、Alessandro Palmieri、Lewis C. H. Maddock、Leonie J. Bole、Alan R. Kennedy、Eva Hevia、Vito Capriati
DOI:10.1002/chem.202001294
日期:2020.7.17
We report the first transition metal catalyst‐ and ligand‐free conjugateaddition of lithium tetraorganozincates (R4ZnLi2) to nitroolefins. Displaying enhanced nucleophilicity combined with unique chemoselectivity and functional group tolerance, homoleptic aliphatic and aromatic R4ZnLi2 provide access to valuable nitroalkanes in up to 98 % yield under mild conditions (0 °C) and short reaction time
作者:Malcolm M Campbell、Nicholas Cosford、Li Zongli、Malcolm Sainsbury
DOI:10.1016/s0040-4020(01)90049-3
日期:1987.1
The syntheses of 3-(2-pyrrolyl)- and 3-(2-furanyl)-indoles are described via the ring-closure of 2-(2-nitrophenylethenyl)-pyrroles or -furans, respectively, with triethylphosphite. The necessary starting compounds are obtained by Lewis acid mediated Michael type addition reactions of either pyrroles or furans to β-nitrostyrene, followed by bromination/dehydrobromination. The ethenylpyrroles may also