Efficient Synthesis of Pyridin‐2(1<i>H</i>)‐ones From a Series of Readily Available Enaminones Under Mild Conditions
作者:Bao‐chang Gao、Yu‐feng Sun、Jun Wang、Li‐wu Zu、Xu Zhang、Wen‐bin Liu
DOI:10.1002/jhet.3333
日期:2018.12
A facile and efficient synthesis of substituted pyridin‐2(1H)‐ones has been developed by the reaction of readily available enaminones with malononitrile in ethanol at room temperature in yields of 85–95%. This protocol, which combines construction and modification of the pyridin‐2(1H)‐ones ring underVilsmeierconditions (dimethylformamide/POCl3), increases the structural diversity of the final products
A facile and efficient one-potsynthesis of polysubstituted pyridin-2(1H)-ones from readily available enaminones and the cyanomethyl sulfonium bromide salt in the presence of cesium carbonate is developed, and a mechanism involving sequential nucleophilic vinylic substitution (S(N)V), intramolecular nucleophilic cyclization and dealkylation reactions is proposed.
The present invention provides an agent for the prophylaxis or treatment of autoimmune diseases (e.g., psoriasis, rheumatoid arthritis, inflammatory bowel disease, Sjogren's syndrome, Behcet's disease, multiple sclerosis, systemic lupus erythematosus etc.) and the like, which has a superior Tyk2 inhibitory action.
The present invention relates to a compound represented by the formula
wherein each symbol is as defined in the specification, or a salt thereof.
The present invention provides an agent for the prophylaxis or treatment of autoimmune diseases (e.g., psoriasis, rheumatoid arthritis, inflammatory bowel disease, Sjogren's syndrome, Behcet's disease, multiple sclerosis, systemic lupus erythematosus etc.) and the like, which has a superior Tyk2 inhibitory action.
The present invention relates to a compound represented by the formula
wherein each symbol is as defined in the specification, or a salt thereof.