Iron-Catalyzed C−O Bond Activation for the Synthesis of Propargyl-1,2,3-triazoles and 1,1-Bis-triazoles
摘要:
The FeCl(3)-catalyzed triazole propargylation was developed. This transformation was suitable for a large scope of substituted propargyl alcohols, giving the corresponding propargyl triazoles In excellent yields (up to 96%). Further derivatization produced the 1,1-bis-triazoles in excellent yields and regioselectivity, which could be applied as potential transition metal ligands or new reagents.
The three-component reaction of benzotriazoles, aldehydes, and alkynes has been carried out for the first time using zinc bromide as a catalyst. The corresponding propargylbenzotriazoles are formed in high yields (79-97%) within 6-10 hours.
Regiodivergent Control in the Gold(I) Catalyzed Synthesis of 7-Pyrazolylindoles from 1-Propargyl-1<i>H</i>
-benzotriazoles and Ynamides through α-Imino Gold(I) Carbene Complexes
participation of α‐imino gold carbene complexes. The use of sulfonyl ynamides drives the reaction to the formation of 2‐amidosubstituted indoles. However, the employment of 2‐oxazolidinolylynamides allows the formation of both isomers, such as, 2‐amido‐ and 3‐amidosubstituted indoles. In this case, the regioselection could be controlled by a correct choice of the catalyst ligand and the electron‐donating