Ionic liquid-mediated benzoyl transfer-coupling in the Suzuki and Sonogashira reactions and aryl transfer-coupling by decarbonylative Heck reaction, using N-Benzoyl-saccharin (NBSac) as reagent
作者:Shruti S. Malunavar、Suraj M. Sutar、Pavankumar Prabhala、Rajesh G. Kalkhambkar、Kenneth K. Laali
DOI:10.1016/j.tetlet.2020.151987
日期:2020.6
of N-benzoyl-saccharin (NBSac) as reagent for selective benzoyl transfer-coupling in the Suzuki reaction in BMIM-IL/[PAIM][NTf2] as solvent/base, and in the Sonogashira reaction employing guanidinium-IL (GIL) as solvent, are demonstrated. Decarbonylative aryl transfer-coupling occurs in the Heck reaction employing GIL as solvent. The reactions are catalyzed by Pd(OAc)2 or NiCl2(dppp), are performed
A nickel‐catalyzed alkylation of polycyclic aromatic methyl ethers as well as methyl enol ethers with B‐alkyl 9‐BBN and trialkylborane reagents that involves the cleavage of stable C(sp2)−OMe bonds is described. The transformation has a wide substrate scope and good chemoselectivity profile while proceeding under mild reaction conditions; it provides a versatile way to form C(sp2)−C(sp3) bonds that
Metal-Catalyzed Dealkoxylative C<sub>aryl</sub>C sp 3 Cross-Coupling-Replacement of Aromatic Methoxy Groups of Aryl Ethers by Employing a Functionalized Nucleophile
The direct replacement of aromaticmethoxygroups with activated carbon nucleophiles would give rise to novel synthetic pathways for targeted and diversity‐oriented syntheses. We demonstrate here that this transformation can be achieved in a one‐step reaction involving a bifunctional organolithium nucleophile in combination with a CArOMe bond‐cleaving nickel catalyst. The resulting products are stable
Piperidine-appended imidazolium ionic liquid as task-specific basic-IL for Suzuki and Heck reactions and for tandem Wittig-Suzuki, Wittig-Heck, Horner-Emmons-Suzuki, and Horner-Emmons-Heck protocols
作者:Hemantkumar M. Savanur、Rajesh G. Kalkhambkar、Kenneth K. Laali
DOI:10.1016/j.apcata.2017.06.015
日期:2017.8
Facile, high yielding, one-pot methods for the synthesis of a library of diversely substituted bi-aryls, diarylethenes, and aryl-enoates, via Suzuki and Heck reactions, and by sequential Wittig-Suzuki, Wittig-Heck, Horner-Emmons-Suzuki, and Horner-Emmons-Heck reactions are reported. The reactions employ piperidine-appended imidazolium ionicliquid [PAIM][NTf2] as a task-specific basic-IL, butyl-methyl-imidazolium