Six-Component Azido-Ugi Reaction: from Cyclic Ketimines to Bis-Tetrazole-Derived 5-7-Membered Amines
作者:Irina V. Kutovaya、Danil P. Zarezin、Olga I. Shmatova、Valentine G. Nenajdenko
DOI:10.1002/ejoc.201900244
日期:2019.4.24
The six‐component azido‐Ugi reaction with 2‐substituted 5–7‐membered imines leads to mono‐ or bis‐tetrazole derivatives depending on the starting imines. The reaction is very general regarding isocyanide structure and enables preparation of 1,5‐disubstituted bis‐tetrazole derivatives connected with 5–7‐membered cyclic amine fragments. Subsequent catalytic debenzylation provides the corresponding 1H‐tetrazoles
Synthesis of azacycloalkane-1,2-fused pyrroles via alkylation of cyclic ketimines with α-bromo ketones
作者:Olga I. Shmatova、Valentine G. Nenajdenko
DOI:10.1016/j.mencom.2018.05.013
日期:2018.5
The reaction of 2-alkyl-substituted 5-, 6- and 7-membered cyclic imines with alpha-bromo ketones in the presence of Hunig's base affords 2,3-dihydro-1H-pyrrolizines, 5,6,7,8-tetrahydroindolizines and 6,7,8,9-tetrahydro-5H-pyrrolo[1,2-alpha]azepines, respectively.
Ruthenium-catalyzed intramolecular hydroamination of aminoalkynes
Low-valent ruthenium complexes with a pi -acidic ligand, such as Ru(eta (6)-cot)(dmfm)(2) [cot = 1,3,5-cyclooctatriene, dmfm = dimethyl fumarate] and Ru-3(CO)(12), showed high catalytic activity for the intramolecular hydroamination of aminoalkynes. The reaction is highly regioselective, in which a nitrogen atom is selectively attached to an internal carbon of alkynes to give five-, six-, and seven-membered nitrogen heterocycles as well as indoles in good to high yields. (C) 2001 Elsevier Science B.V. All rights reserved.
HOFFMAN, ROBERT V.;BUNTAIN, GREGORY A., J. ORG. CHEM., 53,(1988) N 14, 3316-3321