Stereoselective reductions of N-Boc-hexahydro-1H-indolin-5(6H)-ones
作者:Michael A. Brodney、Marcus L. Cole、Jamie A. Freemont、Stella Kyi、Peter C. Junk、Albert Padwa、Andrew G. Riches、John H. Ryan
DOI:10.1016/j.tetlet.2007.01.078
日期:2007.3
stereoselectivity of reduction of the enamide moiety of N-Boc-hexahydro-1H-indolin-5(6H)-ones. Under ionic reduction conditions (triethylsilane/trifluoroaceticacid) the enamide group of 3a-methyl-N-Boc-hexahydro-1H-indolin-5(6H)-one was reduced to afford exclusively a cis ring-fused product. For the 3a-phenyl substituted analogue more forcing conditions (sodiumcyanoborohydride at pH 2–2.5) were required
[EN] NEW ARYLALKENYLPROPARGYLAMINE DERIVATIVES EXHIBITING NEUROPROTECTIVE ACTION FOR THE TREATMENT OF NEURODEGENERATIVE DISEASES<br/>[FR] NOUVEAUX DÉRIVÉS ARYLALCÉNYLPROPARGYLAMINE FAISANT PREUVE D'ACTION NEUROPROTECTRICE POUR LE TRAITEMENT DES MALADIES NEURODÉGÉNÉRATIVES
申请人:SEMMELWEIS EGYETEM
公开号:WO2015087094A1
公开(公告)日:2015-06-18
The invention relates to novel arylalkenylpropargylamine derivatives of general formula (I) or enantiomers or diastereomers thereof or salts, optionally pharmaceutically acceptable salts, or solvates of any of these. The compounds can be used in treating or preventing a disease or condition in a mammal related to monoamine oxidase dysfunction, especially in neurodegenerative diseases, e.g. Parkinson's disease, Alzheimer's disease or Huntington's disease.
The exo-selective C-H cycloaddition of imidazoles to 1,1-disubstitutedalkenes has been achieved for the first time by using half-sandwich scandium catalysts. A wide range of imidazole compounds bearing various 1,1-disubstituted aliphatic alkenes, styrenes, dienes and enynes have been selectively converted in high yields to the corresponding bicyclic imidazole derivatives bearing -all-carbon-substituted
Pyrone Diels-Alder Routes to Indolines and Hydroindolines: Syntheses of Gracilamine, Mesembrine, and Δ<sup>7</sup>-Mesembrenone
作者:Pei Gan、Myles W. Smith、Nathaniel R. Braffman、Scott A. Snyder
DOI:10.1002/anie.201510520
日期:2016.3.7
Although the Diels–Alder reaction has long been utilized for the preparation of numerous heterocycles, opportunities to extend its power remain. Herein, we detail a simple, modular, and robust approach that combines various amines regioselectively with 4,6‐dichloropyrone to create substrates which, under appropriate conditions, can directly deliver varied indolines and hydroindolines through [4+2]
Phosphonylation of alkenes is important for the generation of valuable organophosphines. However, redox-neutral difunctionalization of alkenes with readily available H-P(O) compounds remains underdeveloped. Herein, we report the first visible-light-driven redox-neutral phosphonoalkylation of alkenes. A variety of organophosphorus-containing three-membered carbocyclic scaffolds are synthesized from