Configurationally stable methylates of methano- and ethano-Tröger bases
摘要:
It was discovered that bis-methylation of methano-Troger base is smooth in pure dimethylsulfate, providing new, configurationally stable, bis-methylate 3a. Mono- and bis-methylates 2b and 3b of ethano-Troger base were synthesized. The crystal structures of racemic ethano-Troger base and of its enantiopure methiodide (+)-(5R, 11R)-2b benzene clathrate are also reported. (c) 2006 Elsevier Ltd. All rights reserved.
Chemo- and Stereoselective NBS-Promoted Intermolecular Oxygenation and Nitrogenation of α-C-H Bonds of Tertiary Diamines
作者:Raul Pereira、Elisabeth Otth、Ján Cvengroš
DOI:10.1002/ejoc.201500062
日期:2015.3
A new method for the activation of the non-benzylic α-C–Hbonds in tertiarydiamines has been developed. The protocol relies on an N-bromosuccinimide (NBS)-mediated oxidation of carbon atoms next to the nitrogen atoms in the presence of a catalytic amount of Pd(OAc)2 followed by an intermolecular reaction with oxygen- or nitrogen-centered nucleophiles. Mechanistic studies hint towards a radical intermediate
Synthesis of ethano-Tröger's base, configurationally stable substitute of Tröger's base
作者:Yasumasa Hamada、Shiho Mukai
DOI:10.1016/0957-4166(96)00343-6
日期:1996.9
Optically active ethano Tröger's base with configurationallystable stereogenic nitrogens and an ethylene bridge was synthesized by reaction with 1,2-dibromoethane and subsequent resolution using (−)- and (+)-di-p-toluoyl-D-tartaric acids from commercially available (±)-Tröger's base in one step.
[EN] ETHANO-TRÖGER'S BASE-DERIVED DIAMINES, POLYIMIDES, AND POLYIMIDE-BASED MEMBRANES<br/>[FR] DIAMINES DÉRIVÉES D'UNE BASE D'ÉTHANO-TRÖGER, POLYIMIDES ET MEMBRANES À BASE DE POLYIMIDE
申请人:UNIV KING ABDULLAH SCI & TECH
公开号:WO2020021389A1
公开(公告)日:2020-01-30
Embodiments of the present disclosure generally describe ethano-Tröger's base-amine monomers, ethano-Tröger's base polyimides of intrinsic microporosity, membranes based on ethano-Tröger's base polyimides of intrinsic microporosity, methods of making ethano-Tröger's base-amine monomers, methods of making ethano-Tröger's base polyimides of intrinsic microporosity prepared from ethano-Tröger's base-amine monomers, methods of separating chemical species, and the like.
behaviour. Herein, we report a succinct protocol that utilises potassium permanganate to selectively α-oxygenate the benzylic position of ethano-Tröger's base derivatives to yield a new class of twisted bisamides. Additionally, we report the first synthesis of an ethano-Tröger's base derivative bearing substituents in the positions ortho to the nitrogen atoms.
Configurationally stable methylates of methano- and ethano-Tröger bases
作者:Denis A. Lenev、Denis G. Golovanov、Konstantin A. Lyssenko、Remir G. Kostyanovsky
DOI:10.1016/j.tetasy.2006.07.041
日期:2006.9
It was discovered that bis-methylation of methano-Troger base is smooth in pure dimethylsulfate, providing new, configurationally stable, bis-methylate 3a. Mono- and bis-methylates 2b and 3b of ethano-Troger base were synthesized. The crystal structures of racemic ethano-Troger base and of its enantiopure methiodide (+)-(5R, 11R)-2b benzene clathrate are also reported. (c) 2006 Elsevier Ltd. All rights reserved.