In 2021 ACS CATAL published article about NITROGEN-HETEROCYCLES; ELECTRONIC-STRUCTURES; COMPLEXES; OXIDATION; HYDROGENATION; REACTIVITY in [Das, Siuli; Mondal, Rakesh; Chakraborty, Gargi; Guin, Amit Kumar; Paul, Nanda D.] Indian Inst Engn Sci & Technol, Dept Chem, Howrah 711103, India; [Das, Abhishek] Indian Assoc Cultivat Sci, Sch Chem Sci, Kolkata 700032, India in 2021, Cited 79. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5. Category: indole-building-block
Herein we report an exclusively ligand-centered redox controlled approach for the dehydrogenation of a variety of N-heterocycles using a Zn(II)-stabilized azo-anion radical complex as the catalyst. A simple, easy-to-prepare, and bench-stable Zn(II)-complex (1b) featuring the tridentate arylazo pincer, 2-((4-chlorophenyl)diazenyl)-1,10-phenanthroline, in the presence of zinc-dust, undergoes reduction to form the azo-anion radical species [1b]which efficiently dehydrogenates various saturated N-heterocycles such as 1,2,3,4-tetrahydro-2-methylquinoline, 1,2,3,4-tetrahydro-isoquinoline, indoline, 2-phenyl-2,3-dihydro-1H-benzoimidazole, 2,3-dihydro-2-phenylquinazolin-4(1H)-one, and 1,2,3,4-tetrahydro-2-phenylquinazolines, among others, under air. The catalyst has further been found to be compatible with the cascade synthesis of these N-heterocycles via dehydrogenative coupling of alcohols with other suitable coupling partners under air. Mechanistic investigation reveals that the dehydrogenation reactions proceed via a one-electron hydrogen atom transfer (HAT) pathway where the zinc-stabilized azo-anion radical ligand abstracts the hydrogen atom from the organic substrate(s), and the whole catalytic cycle proceeds via the exclusive involvement of the ligand-centered redox events where the zinc acts only as the template.
Category: indole-building-block. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Das, S; Mondal, R; Chakraborty, G; Guin, AK; Das, A; Paul, ND or concate me.
Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles