Addition reactions; Carboxylation; Catalysis; Organic compounds; Azolium salts; Michael additions; N-heterocyclic carbenes; Precatalysts; Carbon dioxide; Michael addition
Abstract :
[en] N-heterocyclic carbene catalyzed Michael additions have been revisited with 1,3-dialkyl- or 1,3-diarylimidazol(in)ium-2-carboxylates, that is, NHC·CO2 adducts, as the source of the free NHC catalysts in solution. Using these precatalysts, a number of efficient carba-, sulfa-, and phospha-Michael additions were achieved very conveniently, without the need for an external strong base to generate the NHC by deprotonation of an azolium salt. To further expand the scope of the procedure, some NHC-catalyzed sulfa-Michael/aldol organocascades were also investigated.
Disciplines :
Chemistry
Author, co-author :
Hans, Morgan ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique
Delaude, Lionel ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie organométallique et catalyse homogène
Rodriguez, Jean; Aix Marseille Université, Centrale Marseille, CNRS, 13397 Marseille, France
Coquerel, Yoann; Aix Marseille Université, Centrale Marseille, CNRS, 13397 Marseille, France
Language :
English
Title :
N-heterocyclic carbene catalyzed carba-, sulfa-, and phospha-Michael additions with NHC·CO2 adducts as precatalysts
Publication date :
2014
Journal title :
Journal of Organic Chemistry
ISSN :
0022-3263
eISSN :
1520-6904
Publisher :
American Chemical Society, Washington, United States - District of Columbia
N-Heterocyclic Carbenes: From Laboratory Curiosities to Efficient Synthetic Tools; Díez-González, S., Ed.; Royal Society of Chemistry: Cambridge, U.K., 2010.
Heterocyclic Carbenes in Transition Metal Catalysis and Organocatalysis; Cazin, C. S. J., Ed.; Springer: Dordrecht, The Netherlands, 2011.
Ortega, N.; Richter, C.; Glorius, F. Org. Lett. 2013, 15, 1776
Brandau, S.; Maerten, E.; Jørgensen, K. A. J. Am. Chem. Soc. 2006, 128, 14986
Stockland, R. A., Jr.; Taylor, R. I.; Thompson, L. E.; Patel, P. B. Org. Lett. 2005, 7, 851
Lenker, H. K.; Richard, M. E.; Reese, K. P.; Carter, A. F.; Zawisky, J. D.; Winter, E. F.; Bergeron, T. W.; Guydon, K. S.; Stockland, R. A., Jr. J. Org. Chem. 2012, 77, 1378
Tye, H.; Skinner, C. L. Helv. Chim. Acta 2002, 85, 3272
Khan, A. T.; Ghosh, S.; Choudhury, L. H. Eur. J. Org. Chem. 2006, 2226
Gelat, F.; Jayashankaran, J.; Lohier, J.-F.; Gaumont, A.-C.; Perrio, S. Org. Lett. 2011, 13, 3170
Markus, J.; Bernd, P. Chem. Eur. J. 2011, 17, 10417
Rajabi, F.; Saidi, M. R. J. Sulfur Chem. 2005, 26, 251
Chu, C.-M.; Gao, S.; Sastry, M. N. V.; Kuo, C.-W.; Lu, C.; Liu, J.-T.; Yao, C.-F. Tetrahedron 2007, 63, 1863
Clarke, C.; Foussat, S.; Fox, D. J.; Sejer Pedersen, D.; Warren, S. Org. Biomol. Chem. 2009, 7, 1323
Trepohl, V. T.; Mori, S.; Itami, K.; Oestreich, M. Org. Lett. 2009, 11, 1091
Bateman, R. L.; Ashworth, J.; Witte, J. F.; Baker, L.-J.; Bhanumoorthy, P.; Timm, D. E.; Hurley, T. D.; Grompe, M.; McClard, R. W. Biochem. J. 2007, 402, 251
Carta, P.; Puljic, N.; Robert, C.; Dhimane, A.-L.; Fensterbank, L.; Lacôte, E.; Malacria, M. Org. Lett. 2007, 9, 1061
Martínez-Castro, E.; López, Ó.; Maya, I.; Fernández-Bolaños, J. G.; Petrini, M. Green Chem. 2010, 12, 1171
Keglevich, G.; Sipos, M.; Takács, D.; Greiner, I. Heteroat. Chem. 2007, 18, 226