The present invention is directed to certain hydroisoindoline compounds which are useful as neurokinin-1 (NK-1) receptor antagonists, and inhibitors of tachykinin and in particular substance P. The invention is also concerned with pharmaceutical formulations comprising these compounds as active ingredients and the use of the compounds and their formulations in the treatment of certain disorders, including emesis, urinary incontinence, depression, and anxiety.
Catalytic Asymmetric (3 + 3) Cycloaddition of Oxyallyl Zwitterions with α-Diazomethylphosphonates
作者:Yan Liu、Xian Peng、Rui She、Xin Zhou、Yungui Peng
DOI:10.1021/acs.orglett.1c02809
日期:2021.9.17
The unique structure of oxyallyls represents a significant challenge for their catalyticasymmetric applications. Herein, an unprecedented chiral imidodiphosphoric acid-catalytic enantioselective (3 + 3) cycloaddition between oxyallyl zwitterions generated in situ from α-haloketones and α-diazomethylphosphonates was developed. Pharmaceutically interesting chiral pyridazine-4(1H)-ones were obtained
Fe(II)-Catalyzed Amination of Aromatic C−H Bonds via Ring Opening of 2<i>H</i>-Azirines: Synthesis of 2,3-Disubstituted Indoles
作者:Samaresh Jana、Mack D. Clements、Barry K. Sharp、Nan Zheng
DOI:10.1021/ol101130e
日期:2010.9.3
A general method for the synthesis of 2,3-disubstituted indoles is described. The key feature of this method is the amination of aromatic C−H bonds via FeCl2-catalyzed ring opening of 2H-azirines. The method tolerates a variety of functional groups such as Br, F, NO2, OMe, CF3, OTBS, alkenes, and OPiv. The method can also be extended to synthesize azaindoles.
catalysts reported before were unsuccessful in this enantioselective radical C−N bond formation. The surprising preference for rhodium over iridium is attributed to much faster ligand‐exchange kinetics of the rhodium complexes involved in the catalytic cycle, which is crucial to keep pace with the highly reactive and thus short‐lived nitrogen‐centered radical intermediate.
β-(2-Pyridyl) ketones are a unique class of heterocycles with valuable physicochemical properties and emerging relevance as pharmacophores. Herein we report a one-step process for the preparation of various substituted β-(2-pyridyl) ketones from the common starting material, 2,6-lutidine. Furthermore, we demonstrate the utility of this building block by synthesizing of a small set of antimalarial natural