An article 1,6-Aza-Michael addition of para-quinone methides with N-heterocycles catalyzed by Zn(OTf)(2): A regioselective approach to N-diarylmethyl-substituted heterocycles WOS:000546923400005 published article about ASYMMETRIC 1,6-CONJUGATE ADDITION; AZA-MICHAEL ADDITION; STEREOSELECTIVE-SYNTHESIS; COUPLING REACTIONS; EASY ACCESS; CARBAZOLES; 1,6-HYDROPHOSPHONYLATION; ADDITION/AROMATIZATION; 1,6-ADDITION; ALKYLATION in [Guin, Soumitra; Saha, Hemonta K.; Patel, Ashvani K.; Gudimella, Santosh K.; Biswas, Subhankar; Samanta, Sampak] Indian Inst Technol Indore, Discipline Chem, Simrol 453552, Madhya Pradesh, India in 2020.0, Cited 77.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6. Formula: C5H8N2
An efficient Zn(OTf)(2)-catalyzed regioselective C-N bond making reaction between a bunch of aryl/heteroaryl-substituted para-quinone methides as ideal 1,6-acceptors and various aromatic/non-aromatic aza-heterocycles bearing N-H moiety namely carbazoles, pyrazoles, indazole, benzotriazole and saccharin is reported. This 1,6-aza-Michael technique delivers predominantly NI-diarylmethyl-substituted heterocyclic scaffolds bearing a valuable phenolic moiety in good to high yields with an excellent regioselectivity. Furthermore, this LUMO lowering catalytic system allows different kinds of useful functionalities and excels with broad substrates under mild conditions. Importantly, our control experiments suggested that N2-adducts of indazole, benzotriazole and 3-methyl pyrazole as minor isomers were progressively converted into N1-adducts during the reaction via a retro-aza-Michael reaction triggered by Zn(OTf)(2), offering excellent regioselectivities of the products. (C) 2020 Elsevier Ltd. All rights reserved.
Welcome to talk about 67-51-6, If you have any questions, you can contact Guin, S; Saha, HK; Patel, AK; Gudimella, SK; Biswas, S; Samanta, S or send Email.. Formula: C5H8N2
Reference:
Pyrazole – Wikipedia,
,Pyrazoles – an overview | ScienceDirect Topics