A new general synthesis of annulated 1,2,3-triazoles using tandem Sonogashira-CuAAC reaction
作者:Moumita Rakshit、Gandhi K. Kar、Manas Chakrabarty
DOI:10.1007/s00706-015-1430-y
日期:2015.10
AbstractA number of novel, fused 1,2,3-triazoles have been synthesized efficiently by the palladium(0)-copper(I)-catalyzed intramolecular heteroannulation of 2-/1-azidomethyl-1-/2-bromodihydro-naphthalenes, -arene and -cycloalkenes with terminal alkynes involving tandem Sonogashira coupling-CuAAC reaction. Graphical abstract
Flexible Approach for the Synthesis of Annulated 4<i>H</i>-Pyrans Based on a Cu(I)-Catalyzed C-Allylation/O-Vinylation Reaction of Cyclic 1-Bromoallyl Tosylates with Cyclic and Acyclic 1,3-Dicarbonyls
The Cu(I)-catalyzed reaction between five-, six-, seven-, and eight-membered cyclic 1-bromoallyl tosylates and five- and six-memberedcyclic 1,3-dicarbonyls in DMF at 80 °C using Cs2CO3 as a base and 2-picolinic acid as an additive selectively delivers a wide array of bisannulated 4H-pyrans in a single step with yields up to 92%. The transformations are considered to proceed as intermolecular C-al