Substituted Nitrogen Heterocycles and Synthesis and Uses Thereof
申请人:Petasis Nicos A.
公开号:US20090247766A1
公开(公告)日:2009-10-01
The invention relates to a nitrogen heterocycle compound of formula 1:
Also disclosed are a method of synthesizing the compound and use of the compound for treating various diseases and conditions.
A simple and practical method to access N-substituted 2-pyridones via a formal [3+3] annulation of enaminones with acrylates based on RhIII-catalyzed C–H functionalization was developed. Control and deuterated experiments led to a plausible mechanism involving C–H bond cross-coupling and aminolysis cyclization. This strategy provides a short synthesis of structural motifs of N-substituted 2-pyridones
Abstract Acetyl-substituted heterocyclic enamines 4 were synthesized from lactim ethers 2 and acetylacetone through condensation and deacetylation reactions, and they, along with the ester-substituted heterocyclic enamines 6, reacted with diethylazodicarboxylate to afford C-adducts 7 and 8 in excellent yields.
A systematic study of reaction of heterocyclic enamines with electrophilic alkynes: a simple and efficient synthetic route to 2-pyridinone-fused heterocycles
The reaction of heterocyclic enamines with ethyl propiolate and diethyl acetylenedicarboxylate has been systematically studied. In contrast to their heterocyclic ketene aminal analogues, heterocyclic enamines reacted with electrophilic alkynes via the Michael addition pathway rather than the aza-ene reaction mechanism. In the presence of a strong base such as sodium ethoxide and sodium hydride, the