N-(pyridine-2-yl)amides in water from ketones and 2-aminopyridine via direct oxidative C–C bond cleavage has been developed. A series of ketones, including more challenging inactive aromaticketones substituted with diverse long-chain alkyl groups, were selectively converted to N-(pyridine-2-yl)amides. Furthermore, the protocol can be applied to aryl alkyl carbinols to afford the corresponding amides in moderate
A mild and green methodology for the construction of N‐(pyridine‐2‐yl)amides from alkylarenes and 2‐aminopyridine in one step was developed. Various alkylarenes were directly transformed into the corresponding N‐(pyridine‐2‐yl)amides through tandem C(sp3)–H bond activation/oxidative cyclization/C–C bondcleavage.
A procedure for the synthesis of N-heteroaryl amides directly from oxidative amidation of aldehydes catalyzed by heteropolyanion-based ionic liquids has been reported. The proposed N-directing dual-catalysis mechanism was briefly investigated.
Singlet oxygen mediated dual C–C and C–N bond cleavage in visible light
作者:Ritu、Charu Sharma、Sharvan Kumar、Nidhi Jain
DOI:10.1039/d0ob00563k
日期:——
A tandem cleavage of carbon-carbon and carbon-nitrogen bonds in imidazo[1,2-a]pyridines and imidazo[1,2-a]quinolines is reported in the presence of eosin Y and visible light. The ring opening occurs under ambient conditions through singletoxygen insertion, bond cleavage and CO2 elimination, and produces N-(pyridin-2-yl) amides and N-(quinolin-2-yl) amides in high yields. The reaction shows good versatility
compounds showed broad‐spectrum antimycobacterial activity against M. tuberculosis H37Ra, M. smegmatis and M. aurum. N‐(pyridin‐2‐yl)benzamides were generally more active than N‐(pyridin‐3‐yl)benzamides, indicating that N‐1 in the parental structure of N‐pyrazinylbenzamides might be more important for antimycobacterial activity than N‐4. Marginal antibacterial and antifungal activity was observed for title