作者:Oscar Lozano、George Blessley、Teresa Martinez del Campo、Amber L. Thompson、Guy T. Giuffredi、Michela Bettati、Matthew Walker、Richard Borman、Véronique Gouverneur
DOI:10.1002/anie.201103151
日期:2011.8.22
Enantioenriched fluorinated heterocycles can be prepared through fluorocyclizations of prochiral indoles (see scheme; Ts=tosyl, Bn=benzyl, Boc=tert‐butoxycarbonyl). More than twenty examples for this cascade fluorination–cyclization, which is catalyzed by cinchona alkaloids and employs N‐fluorobenzenesulfonimide as the electrophilic fluorine source have been explored, and an unprecedented catalytic
Novel amino‐acid‐derived phthalazine reagents have been designed and synthesized for the enantioselectivefluorocyclizations of prochiral indoles. The scope of reaction is evidenced by 28 examples of fluorinated furoindole and pyrroloindole heterocycles bearing various functionalities with up to 99% ee. The resulting enantioenriched fluorinated products are found to be potent AChE inhibitors. Advantages
Visible-Light-Induced Metal-Free Selenation of Tryptamines/3-Substituted Indoles
作者:Ravi P. Singh、Shashank Singh、Kalyan S. Naskar、Arindam Kundu
DOI:10.1055/a-2112-2353
日期:2023.11
novel metal-free, oxidant-free phosphoric acid-catalyzed method for the synthesis of 2-selanyl NHCbz-tryptamines/3-subtituted indoles is presented. This direct C-2 selenation strategy, with environmental benign conditions by reaction of tryptamines/3-substituted indoles and diaryl/dialkyl selenides, allows access to a wide range of 2-aryl/alkylselanyl NHCbz-tryptamines/3-substituted indoles. An experimental
Chiral Bisamino-Ether Compounds, And Method of Preparation and Use Thereof
申请人:JINAN UNIVERSITY
公开号:US20220162219A1
公开(公告)日:2022-05-26
The present invention provides novel chiral bisamino-ether compounds, and method of preparation and use thereof. The chiral bisamino-ether compounds have the structure of formula (I). The method of preparation includes: using chiral aminomethanol compounds as starting materials to react with halogenated aryl compounds in the presence of a base to give a variety of chiral bisamino-ether compounds. The novel chiral bisamino-ether compounds can be used for asymmetric fluorocyclization of unsaturated heterocyclic compounds with excellent enantioselectivity and great potentials for industrial applications.