Vinyl Nosylates: An Ideal Partner for Palladium-Catalyzed Cross-Coupling Reactions
作者:Nicolas P. Cheval、Anna Dikova、Aurélien Blanc、Jean-Marc Weibel、Patrick Pale
DOI:10.1002/chem.201300127
日期:2013.7.1
In a hurry to leave! Nosylates act as an excellent leavinggroup in various palladium‐catalyzed cross‐couplings, such as Suzuki, Stille, Heck, and Sonogashira reactions (see scheme). Crystalline, stable, and cheap vinyl and aryl nosylates proved better than classical halides and triflates, consistently giving higher yields of coupling products. Their usefulness in CCbondformation was also demonstrated
with benzaldehyde were studied in water in heterogeneous phase in the presence and absence of anionic and cationicsurfactants such as SLS, CTACl, (CTA)2SO4 and CTAOH. All the reactions occur with excellent yields. The cationicsurfactants favour the reaction and the comparison with the corresponding tetrabutylammonium salts show that the micellar catalysis is effective mainly towards the dehydration
(E)-(2-Bromoethenyl)diisopropoxyborane is a useful precursor for the synthesis of (E)-olefins by the stepwise cross-coupling reaction with organozinc chlorides and then with organic halides in the presence of a base, both catalyzed by Pd complex.
Suzuki–Miyaura cross-coupling of alkenyl tosylates with alkenyl MIDA boronates
作者:Monique Lüthy、Richard J.K. Taylor
DOI:10.1016/j.tetlet.2012.04.091
日期:2012.7
procedure for the palladium-catalysed Suzuki–Miyaura coupling of various alkenyltosylates with alkenyl MIDA boronates has been developed. Commercially available trans-bromo[N-succinimidyl-bis(triphenylphosphine)]palladium(II) [Pd(PPh3)2NBS] is an effective catalyst under the slow release conditions of MIDA boronates; with less activated alkenyltosylates addition of the cheap, air-stable tricyclohexylphosphine
Handy Protocols using Vinyl Nosylates in Suzuki-Miyaura Cross-Coupling Reactions
作者:Anna Dikova、Nicolas P. Cheval、Aurélien Blanc、Jean-Marc Weibel、Patrick Pale
DOI:10.1002/adsc.201500682
日期:2015.12.14
Vinylnosylates derived from 1,3-dicarbonyl compounds could be engaged in Suzuki–Myaura cross coupling reactions with aryl-, vinyl- and methylboronic acids or trifluoborate derivatives at room temperature in the presence of 2 mol% of [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) [PdCl2(dppf)]. One-pot procedures have been set up for practical and efficient nosylation–cross-coupling reactions