Intramolecular cyclization of ortho-alkynylanilines by Rh(I)-catalyzed hydroamination to yield benzo(dipyrroles)
摘要:
The methylene-bridged Rh(1) dicarbonyl complex, [Rh(bim)(CO)(2) BPh4 (1) (bim = bis(N-methylimidazol-2-yl)methane), is an effective catalyst for the intramolecular hydroamination of selected ortho-alkynylanilines to give a range of benzo(dipyrroles). (C) 2009 Elsevier Ltd. All rights reserved.
site-selectivity switch has been achieved in the ruthenium-catalyzed C–H arylation reaction of N-acetyl-1,2-dihydroisoquinolines. This metal-mediated switch is antipodal to the previous report on the palladium-mediated C-4 C–H arylation on the same substrate. Mechanistic details reveal interesting aspects of the reaction pathway, and kinetic studies bring out the difference in the modes of C–H activation
An Ir(III)-catalyzed C(3)–H alkylation of N-acetyl-1,2-dihydroisoquinolines with diverse acceptor–acceptor diazo compounds has been achieved under a single catalytic system via metal carbene migratory insertion. Moreover, further synthetic transformations of the alkylated products such as aromatization, selective decarboxylation, and decarbonylation lead to the formation of several synthetically viable
A new approach for the functionalization of C-4 of isoquinolines is reported. The method utilizes palladium catalyzed, hetero-atom guided (or electrophilic metalation) direct arylation via regioselective CâH functionalization of dihydroisoquinolines.
Ruthenium-Catalyzed Cycloisomerization of Aromatic Homo- and Bis-Homopropargylic Amines/Amides: Formation of Indoles, Dihydroisoquinolines and Dihydroquinolines
作者:Alejandro Varela-Fernández、Jesús A. Varela、Carlos Saá
DOI:10.1002/adsc.201100095
日期:2011.8
Ruthenium-catalyzed cycloisomerizations of aromatic homo- and bis-homopropargylic amines/amides efficiently afford indoles, dihydroisoquinolines and dihydroquinolines. These processes were regioselective (5- and 6-endo cyclizations) on using key Ru vinylidene intermediates. The presence of an amine/ammonium base-acid pair increased the rate of cyclization and facilitated the catalytic turnover.
[DE] 2-PYRROLIDIN-2-YL-[1,3,4]-OXADIAZOL-DERIVATE UND IHRE VERWENDUNG ALS ANTIDEPRESSIVA<br/>[EN] 2-PYRROLIDIN-2-YL-[1,3,4]-OXADIAZOLE DERIVATIVES AND THE USE OF THE SAME AS ANTIDEPRESSANTS<br/>[FR] DERIVES DE 2-PYRROLIDIN-2-YL-[1,3,4]-OXADIAZOLE ET LEUR UTILISATION EN TANT QU'ANTIDEPRESSEURS
申请人:GRUENENTHAL GMBH
公开号:WO2004024725A1
公开(公告)日:2004-03-25
Die Erfindung betrifft substituierte 2-Pyrrolidin-2-yl-[1,3,4]-oxadiazol-Derivate, Verfahren zu deren Herstellung, Arzneimittel enthaltend diese Verbindungen sowie die Verwendung dieser Stoffe zur Herstellung von Arzneimitteln, vorzugsweise zur Behandlung von Depressionen, und Verfahren zur Behandlung von Depressionen.