Green and Selective Synthesis ofN-Substituted Amides using Water Soluble Porphyrazinato Copper(II) Catalyst
摘要:
N, N',N '', N '''-Tetramethyl tetra-2,3-pyridinoporphyrazinato copper(II) methyl sulfate ([Cu(2,3-tmtppa)](MeSO4)(4)) efficiently catalyzed the direct conversion of nitriles to N-substituted amides. The one pot selective synthesis of the N-substituted amides from nitriles and primary amines was performed in refluxing H2O. The catalyst was recovered and reused at least four times, maintaining its efficiency.
Palladium-Catalyzed CS Activation/Aryne Insertion/Coupling Sequence: Synthesis of Functionalized 2-Quinolinones
作者:Ying Dong、Bangyu Liu、Peng Chen、Qun Liu、Mang Wang
DOI:10.1002/anie.201310340
日期:2014.3.24
The insertion of an aryne into a CS bond can suppress the addition of an S nucleophile to the aryne in the presence of palladium. Catalyzed by Pd(OAc)2, a wide range of α‐carbamoyl ketene dithioacetals readily react with arynes to selectively afford functionalized 2‐quinolinones in high yields under neutral reaction conditions by a CSactivation/aryneinsertion/intramolecular couplingsequence. The