Synthesis of Pentacyclic 13-Azadibenzo[a,de]anthracenes via Anionic Cascade Ring Closure
摘要:
Bromine-lithium exchange using tert-butyllithium at -78 degreesC initiates a cascade process whereby either xanthone derivatives or pentacyclic 13-azadibenzo[a,de]-anthracenes are produced in high yields. The reaction proceeds via a sequential intramolecular trapping of organolithium intermediates.
Polycyclic fused phenanthridines: An alternative approach from benzotriazoles
作者:Alan R. Katritzky、Weihong Du、Yasuhisa Matsukawa、Ion Ghiviriga、Sergey N. Denisenko
DOI:10.1002/jhet.5570360417
日期:1999.7
We describe an alternativeapproach to polycyclicphenanthridines (7) and some of their analogues using conditions much milder than those previously reported. The procedure includes the generation of a benzotriazole stabilized carbanion, oxidation of the resulting anion to a radical, and elimination of nitrogen followed by ring closure to produce phenanthridines.
MATERIALIEN FÜR ORGANISCHE ELEKTROLUMINESZENZVORRICHTUNGEN
申请人:Merck Patent GmbH
公开号:EP3548485A1
公开(公告)日:2019-10-09
[DE] MATERIALIEN FÜR ORGANISCHE ELEKTROLUMINESZENZVORRICHTUNGEN<br/>[EN] MATERIALS FOR ORGANIC ELECTROLUMINESCENT DEVICES<br/>[FR] MATÉRIAUX POUR DISPOSITIFS ÉLECTROLUMINESCENTS ORGANIQUES
申请人:MERCK PATENT GMBH
公开号:WO2018104193A1
公开(公告)日:2018-06-14
Die vorliegende Erfindung betrifft Verbindungen, die sich für die Verwendung in elektronischen Vorrichtungen eignen, sowie elektronische Vorrichtungen, insbesondere organischen Elektrolumineszenzvornchtungen, enthaltend diese Verbindungen.