Diversity-oriented synthesis of 1,3-benzodiazepines
摘要:
A concise assembly of the 1,3-benzodiazepine core from A(3')-coupling-derived propargylamines and ortho-bromophenylisocyanates is described. The developed synthetic sequence involves the addition of propargylamine to isocyanate followed by palladium-catalyzed intramolecular alkyne hydroarylation that could be accomplished in a stepwise or one-pot manner. (C) 2017 Elsevier Ltd. All rights reserved.
Tetrasubstituted 2-Imidazolones via Ag(I)-Catalyzed Cycloisomerization of Propargylic Ureas
作者:Vsevolod A. Peshkov、Olga P. Pereshivko、Sweta Sharma、Thirumal Meganathan、Virinder S. Parmar、Denis S. Ermolat’ev、Erik V. Van der Eycken
DOI:10.1021/jo200789t
日期:2011.7.15
A one-pot protocol based on a Ag(I)-catalyzed cycloisomerization of propargylic ureas, derived from secondary propargylamines and isocyanates, was developed for the generation of the 2-imidazolone core.
Unexpected regio- and chemoselectivity of cationic gold-catalyzed cycloisomerizations of propargylureas: access to tetrasubstituted 3,4-dihydropyrimidin-2(1H)-ones
作者:Olga P. Pereshivko、Vsevolod A. Peshkov、Anatoly A. Peshkov、Jeroen Jacobs、Luc Van Meervelt、Erik V. Van der Eycken
DOI:10.1039/c3ob42221f
日期:——
Cationic gold-catalyzed cycloisomerizations of propargylureas, derived in situ from secondary propargylamines and aryl or alkyl isocyanates, have been studied. The reaction outcome was found to be different from what was previously observed for the tosyl isocyanate-derived ureas in terms of both regio- and chemoselectivity. As a result, the current protocol offers efficient access to the 3,4-dihydropyrimidin-2(1H)-one core through the 6-endo-dig N-cyclization.
Copper-Catalyzed Reaction of Secondary Propargylamines with Ethyl Buta-2,3-dienoate for the Synthesis of 1,6-Dihydropyridines
作者:Chao Liu、Gaigai Wang、Yuqing Wang、Olga P. Pereshivko、Vsevolod A. Peshkov
DOI:10.1002/ejoc.201801227
日期:2019.3.14
A copper(I) bromide‐catalysed reaction of A3‐coupling‐derived propargylamines with ethyl buta‐2,3‐dienoate for the fast assembly of a 1,6‐dihydropyridine core is described. The possibility of a one‐pot synthesis of 1,6‐dihydropyridine through the A3‐coupling and subsequent ethyl buta‐2,3‐dienoate incorporation was investigated.
Diversity-oriented synthesis of 1,3-benzodiazepines
作者:Gaigai Wang、Chao Liu、Binbin Li、Yingchun Wang、Kristof Van Hecke、Erik V. Van der Eycken、Olga P. Pereshivko、Vsevolod A. Peshkov
DOI:10.1016/j.tet.2017.09.034
日期:2017.11
A concise assembly of the 1,3-benzodiazepine core from A(3')-coupling-derived propargylamines and ortho-bromophenylisocyanates is described. The developed synthetic sequence involves the addition of propargylamine to isocyanate followed by palladium-catalyzed intramolecular alkyne hydroarylation that could be accomplished in a stepwise or one-pot manner. (C) 2017 Elsevier Ltd. All rights reserved.