Palladium-Catalyzed C–H Arylation of 1,2,3-Triazoles
نویسندگان
چکیده
Palladium(II) acetate, in combination with triphenylphosphine, catalyzes direct arylation of 1,4-disubstituted 1,2,3-triazoles effectively. This C-H arylation reaction provides facile access to fully substituted triazoles with well-defined regiochemistry.
منابع مشابه
Palladium-catalyzed olefination and arylation of 2-substituted 1,2,3-triazole N-oxides.
Two highly efficient protocols for the regioselective synthesis of 2-substituted 4-alkenyl- and 4-aryl-1,2,3-triazoles by the palladium-catalyzed C-H functionalization of 1,2,3-triazole N-oxides are reported. A possible pathway of direct alkenylation with 1-octene and vinyl acetate is discussed.
متن کاملCopper-catalyzed CuAAC/intramolecular C–H arylation sequence: Synthesis of annulated 1,2,3-triazoles
Step-economical syntheses of annulated 1,2,3-triazoles were accomplished through copper-catalyzed intramolecular direct arylations in sustainable one-pot reactions. Thus, catalyzed cascade reactions involving [3 + 2]-azide-alkyne cycloadditions (CuAAC) and C-H bond functionalizations provided direct access to fully substituted 1,2,3-triazoles with excellent chemo- and regioselectivities. Likewi...
متن کاملC-H arylations of 1,2,3-triazoles by reusable heterogeneous palladium catalysts in biomass-derived γ-valerolactone.
C-H arylations were accomplished with a user-friendly heterogeneous palladium catalyst in the biomass-derived γ-valerolactone (GVL) as an environmentally-benign reaction medium. The user-friendly protocol was characterized by ample substrate scope and high functional group tolerance in the C-H arylation of 1,2,3-triazoles, and the palladium catalyst could be recycled and reused in the C-H activ...
متن کاملPalladium-catalyzed ortho-C-H alkenylation of 2-benzyl-1,2,3-triazoles.
A mild and efficient method for the direct alkenylation of 2-benzyl-1,2,3-triazoles via Pd-catalyzed C-H bond activation was developed. This protocol was compatible with various substrates and gave the corresponding products in good to excellent yields. Thus, the present study provides a novel and valuable method for the synthesis of 2-benzyl-1,2,3-triazole derivatives.
متن کاملPalladium-catalyzed ortho-acylation of 2-benzyl-1,2,3-triazoles with aldehydes.
A palladium-catalyzed ortho-acylation of 2-benzyl-1,2,3-triazoles with aldehydes as an acyl source was developed. A wide variety of ketones containing 1,2,3-triazoles were obtained in good to excellent yields. This methodology provides a convenient access to the acylation of 2-substituted-1,2,3-triazoles.
متن کامل