Results 121 to 130 of about 861 (190)

Highly Diastereo- and Enantioselective Synthesis of Tetrahydrobenzo[b]azocines via Palladium-Catalyzed [4 + 4] Cycloaddition

ACS Catalysis, 2021
The construction of N-heterocyclic eight-membered rings with good regio-, stereo-, and enantioselective control remains a formidable challenge in asymmetric catalysis.
Can Gao, Xun Wang, Jitian Liu, Xiaoxun Li   +3 more
semanticscholar   +1 more source

Diastereoselective synthesis of tetrahydrobenzo[b]azocines by Lu(OTf)3-catalyzed [4+4] cycloaddition of donor-acceptor cyclobutanes with anthranils.

Chemical Communications, 2022
The construction of N-heterocyclic eight-membered rings remains challenging due to unfavorable transannular strain. Herein, we report a Lu(OTf)3-catalyzed formal [4+4] cycloaddition reaction of cyclobutane 1,1-diesters with anthranils to deliver oxa ...
Meifeng Hou, Jiajun Li, Fucai Rao, Zuliang Chen, Yingjing Wei   +4 more
semanticscholar   +1 more source

Isolation and biological activity of azocine and azocane alkaloids

Bioorganic & Medicinal Chemistry, 2022
Thousands of known alkaloids contain a nitrogen (N) heterocycle. While five-, six- and seven-membered N-heterocycles (ie: pyrroles, imidazoles, indoles, pyridines and azepines and their saturated variants) are common, those with an eight-membered N-heterocycle are comparatively rare. This review discusses the structure and bioactivity of alkaloids that
Stephanie, Lee, Jonathan, Sperry
openaire   +2 more sources

An azocine anion radical and heats of formation of azocine dianions

Journal of the American Chemical Society, 1983
La dimethyl-3,8 methoxy-2 azocine est reduite en son radical anionique dans l'HMPT dont on etudie la stabilite thermodynamique.
Cheryl D. Stevenson, Laurel E. Schock, Richard C. Reiter, John F. Hansen   +3 more
openaire   +1 more source

Synthesis of 6,12-Methanodibenzo[c,f]azocines and 4-Aryltetrahydroisoquinolines from Aromatic Aldehydes.

Organic Letters, 2019
A methodology for the synthesis of 7,12-dihydro-5H-6,12-methanodibenzo[c,f]azocines from aromatic aldehydes and N-(methoxymethyl)-N-(trimethylsilylmethyl)benzylamine using catalysis by trifluoroacetic and perchloric acids is described.
E. Buev, M. A. Stepanov, V. Moshkin, V. Sosnovskikh   +3 more
semanticscholar   +1 more source

A new synthesis of azocines

Australian Journal of Chemistry, 1972
Methyl and ethyl 7,8-diphenylazocine-2-carboxylate have been prepared by the reaction of dimethyl tricyclo[4,2,2,02,5]deca-3,7,9-triene-7,8-dicarboxylate with methyl or ethyl 5,6-diphenyl-1,2,4-triazine-3-carboxylate. The flexibility of this azocine ring system has been studied by p.m.r.
JA Elix, WS Wilson, RN Warrener, IC Calder   +3 more
openaire   +1 more source

A concise and efficient concurrent synthesis of 6,11-dihydrodibenzo[b,e]azepines and 5,6,11,12-tetrahydrodibenzo[b,f]azocines and their conversion to 4-oxo-8,13-dihydro-4H-benzo[5,6]azepino[3,2,1-ij]quinoline-5-carboxylates and N-acetyl-5,6,11,12-tetrahydrodibenzo[b,f]azocines: synthetic sequence, s

Acta Crystallographica Section C Structural Chemistry, 2019
Reaction of 2-allyl-N-benzyl-4-fluoroaniline or 2-allyl-N-benzyl-4-chloroaniline with 98% sulfuric acid leads to the concurrent formation of halogeno-substituted 11-ethyl-6,11-dihydrodibenzo[b,e]azepines, (II), and halogeno-substituted 11-methyl-5,6,11 ...
Lina M Acosta Quintero, A. Palma, J. Cobo, C. Glidewell   +3 more
semanticscholar   +1 more source

Über Dibenz[b,f]‐azocin‐Derivate

Helvetica Chimica Acta, 1966
AbstractAus o‐Aminodibenzyl (I) und o‐Amino‐cis‐stilben (IV) wurden mit Phosgen die Isocyanate II bzw. VIII hergestellt. Diese wurden als Harnstoffe V bzw. VII charakterisiert. Mit AlCl3 in Dichlorbenzol behandelt, ging II in das Azocin III über, während aus VIII das Indolon IX entstand.
O. Schindler, R. Blaser, F. Hunziker
openaire   +1 more source

Synthesis of Azepine- or Azocine-Embedded Hexabenzocoronene-Based Nanographenes

Synlett, 2021
AbstractClassical polycyclic aromatic hydrocarbons (PAHs) are a large group of π-conjugated planar structures. To explore more properties of PAHs, new structures have been designed, including some with nonplanar topologies and heteroatom-containing moieties.
Peng An, Bin Ma, Ming-Jun Xiao, Pi-Jin Liu   +3 more
openaire   +1 more source

ChemInform Abstract: Synthesis of Heteroannulated Azocine Derivatives

ChemInform, 2008
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Leonid G. Voskressensky, Larisa N. Kulikova, Tatiana N. Borisova, Alexey V. Varlamov   +3 more
openaire   +1 more source