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.
Optically active and photoswitchable Tröger's base analogs
作者:Masoud Kazem-Rostami
DOI:10.1039/c9nj01372e
日期:——
enantiomer separation of a chiral Tröger's base analog and its use, as an opticallyactivebuildingblock, in the construction of molecular superstructures are presented. Various strategies are illustrated here for the attachment of azo photoswitches to the Tröger's base scaffold without racemizing its stereogeniccenters. The resulting opticallyactive photoswitches introduced chirality, thermochromic, and
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.