Direct synthesis of N-heterocycles via the acceptorless dehydrogenative coupling is very challenging and scarcely reported under 3d transition-metal catalysis. Here, we have developed an efficient Mn(I)-catalyzed sustainable synthesis of various quinoxalines from 1,2-diaminobenzenes and 1,2-diols via the acceptorless dehydrogenative coupling reaction. Further, this strategy was successfully applied
The invention relates to novel compounds of the formula (I) which can be used for the inhibition of serine-threonine protein kinases and for the sensitisation of cancer cells to anticancer agents and/or ionising radiation.
Niacin as a Potent Organocatalyst towards the Synthesis of Quinazolines Using Nitriles as C-N Source
作者:Raghuram Gujjarappa、Nagaraju Vodnala、Velma Ganga Reddy、Chandi C. Malakar
DOI:10.1002/ejoc.201901651
日期:2020.2.21
An organocatalyzed protocol has been described for the comprehensive synthesis of 2‐substituted quinazolines usingnitriles as C–N source. The developed reaction conditions are suitable for a wide range of substrates providing the desired products in excellent yields.
Nickel-Catalyzed [4 + 2] Annulation of Nitriles and Benzylamines by C–H/N–H Activation
作者:Rina Sikari、Gargi Chakraborty、Amit Kumar Guin、Nanda D. Paul
DOI:10.1021/acs.joc.0c02069
日期:2021.1.1
Nickel-catalyzed [4 + 2] annulation of benzylamines and nitriles via C–H/N–H bond activation, providing straightforward atom-economic access to a wide variety of multisubstituted quinazolines, is reported. Mechanistic investigation revealed that the in situ formed amidines from the coupling of benzylamines and nitriles direct the nickel catalyst to activate the ortho-C–H bond of the phenyl ring of