Ag-catalyzed cyclization of 2-alkynylbenzylazides offers a novel and efficient method for the synthesis of substituted isoquinoline. The reaction proceeds smoothly in moderate to good yields and tolerates considerable functional groups. The reaction conditions and the scope of the process are examined, and a plausible mechanism is proposed.
Cobalt‐Mediated Decarboxylative/Desilylative C−H Activation/Annulation Reaction: An Efficient Approach to Natural Alkaloids and New Structural Analogues
A Co(II)- mediated decarboxylative/desilylative C−H activation/annulation reaction for the synthesis of 3-arylisoquinoline derivatives has been developed with a good functional group tolerance and wide applications.
An Efficient Synthesis of 3-Substituted Isoquinoline and Pyridine Derivatives by Gold Catalyzed Intramolecular Cyclization from<i>o</i>-Alkynyloximes
作者:K. P. V. Subbarao、G. Raveendra Reddy、A. Muralikrishna、K. V. Reddy
DOI:10.1002/jhet.2109
日期:2014.7
A one‐pot reaction was developed efficiently by AuCl3 catalyzed intramolecularcyclization of aromatic o‐alkynyloximes and 2‐alkynylcycloalkene‐1‐carbaldoximes leading to the formation of isoquinoline and pyridine derivatives with high yields. This methodology has been applied for aromatic as well as aliphatic systems. Aromatic o‐alkynyloximes are benzene and naphthalene, whereas electron‐donating
Study on the iodine-catalyzed reaction of 3-aminopyrazine-2-carbohydrazide and 2-(arylethynyl)benzaldehydes
作者:Wan-Chen Pan、Jian-Quan Liu、Xiang-Shan Wang
DOI:10.1016/j.tet.2018.02.007
日期:2018.3
At 60 °C in DMSO, the iodine-catalyzed reaction of 3-aminopyrazine-2-carbohydrazide and 2-(arylethynyl)benzaldehydes led hydrazones. Increasing the reaction temperature to 100 °C, the amino and amido still indicated inactive, only the imine took part in the addition of acetylene bond to give 2-arylisoquinolines in high yields with the cleavage of N-N bond unexpectedly under metal-free conditions.