873006-01-0Relevant articles and documents
Iodolopyrazolium Salts: Synthesis, Derivatizations, and Applications
Boelke, Andreas,Caspers, Lucien D.,Kuczmera, Thomas J.,Lork, Enno,Nachtsheim, Boris J.
, p. 7261 - 7266 (2020/10/05)
The synthesis of iodolopyrazolium triflates via an oxidative cyclization of 3-(2-iodophenyl)-1H-pyrazoles is described. The reaction is characterized by a broad substrate scope, and various applications of these novel cyclic iodolium salts acting as useful synthetic intermediates are demonstrated, in particular in site-selective ring openings. This was finally applied to generate derivatives of the anti-inflammatory drug celecoxib. Their application as highly active halogen-bond donors is shown as well.
Phosphine/palladium-catalyzed syntheses of alkylidene phthalans, 3-deoxyisoochracinic acid, isoochracinic acid, and isoochracinol
Fan, Yi Chiao,Kwon, Ohyun
, p. 3264 - 3267 (2012/08/28)
In this study we used sequential catalysis-PPh3-catalyzed nucleophilic addition followed by Pd(0)-catalyzed Heck cyclization-to construct complex functionalized alkylidene phthalans rapidly, in high yields, and with good stereoselectivities (E/Z ratios of up to 1:22). The scope of this Michael-Heck reaction includes substrates bearing various substituents around the alkylidene phthalan backbone. Applying this efficient sequential catalysis, we accomplished concise total syntheses of 3-deoxyisoochacinic acid, isoochracinic acid, and isoochracinol.
Molybdenum(0)-promoted carbonylative cyclization of o-haloaryland β-haloalkenylimine derivatives by oxidative addition of a carbon(sp 2)-halogen bond: Preparation of two types of γ-lactams
Takaya, Jun,Sangu, Kenichiro,Iwasawa, Nobuharu
supporting information; experimental part, p. 7090 - 7093 (2009/12/28)
-