87838-35-5Relevant academic research and scientific papers
La(OTf)3-catalysed one-pot synthesis of pyrazole tethered imidazo[1,2-: A] azine derivatives and evaluation of their light emitting properties
Sharma, Shubham,Paul, Avijit Kumar,Singh, Virender
supporting information, p. 684 - 694 (2020/01/31)
A facile and efficient protocol has been unfolded towards the diversity-oriented synthesis of highly fluorescent pyrazole C-3(5) tethered imidazo[1,2-a]azines via an La(OTf)3 catalysed one-pot multicomponent assembly of pyrazole carbaldehydes, 2-aminoazines and isonitriles. This present protocol offers several advantages such as multiple bond formation in a single step, low catalyst loading, short reaction time, appreciable atom economy, good functional group tolerance, scalability and easy to perform reaction conditions. The optical properties of pyrazolyl imidazo[1,2-a]azines were also studied, and they exhibited an excellent fluorescence quantum yield (ΦF up to 83%).
Alkyne [3 + 2] cycloadditions of iodosydnones toward functionalized 1,3,5-trisubstituted pyrazoles
Browne, Duncan L.,Taylor, John B.,Plant, Andrew,Harrity, Joseph P. A.
supporting information; experimental part, p. 984 - 987 (2010/05/18)
(Chemical Equation Presented) The cycloaddition of 4-iodosydnones with terminal alkynes proceeds with excellent regiocontrol to provide 5-iodo pyrazoles. These products participate smoothly in subsequent C-C and C-heteroatom bond forming processes.
4,5-Dihydroisoxazoles. Part 5. Addition Reactions of Diazoalkanes. Nitrile Imines and Nitrile Oxides to 3-Aryl-4-methylene-5-morpholino-4,5-dihydroisoxazoles
Ballabio, Marzia,Croce, Piero Dalla,Massari, Valeria,Pocar, Donato,Riva, Alberto,Trimarco, Pasqualina
, p. 1317 - 1340 (2007/10/02)
Some 5-morpholino-3-aryl-4-methylene-4,5-dihydroisoxazoles were reacted with nitrile oxides, diazoalkanes and nitrile imines.The corresponding cycloaddition products, namely spiro and spirobi derivatives, were obtained
