A Two-Step Synthesis of Unprotected 3-Aminoindoles via Post Functionalization with Nitrostyrene
作者:Nicolai A. Aksenov、Nikolai A. Arutiunov、Igor A. Kurenkov、Vladimir V. Malyuga、Dmitrii A. Aksenov、Daria S. Momotova、Anna M. Zatsepilina、Elizaveta A. Chukanova、Alexander V. Leontiev、Alexander V. Aksenov
DOI:10.3390/molecules28093657
日期:——
A novel, low-cost method for the preparation of not easily accessible free 3-aminoindoles has been developed. This approach is based on a well-established reaction between indoles and nitrostyrene in the presence of phosphorous acid, which results in the formation of 4′-phenyl-4′H-spiro[indole-3,5′-isoxazoles]. The latter could be transformed to corresponding aminated indoles by reaction with hydrazine
The present invention is directed to dye mixtures comprising structures of formula
and
and/or
their production and their use for dyeing textiles and in particular for dyeing aramid fibres.
An efficient base-mediated intramolecular condensation of 2-(disubstituted amino)-benzonitriles to 3-aminoindoles
作者:Churl Min Seong、Chul Min Park、Jinil Choi、No Sang Park
DOI:10.1016/j.tetlet.2008.12.052
日期:2009.3
A concise and versatile method for the preparation of 3-aminoindoles from 2-(disubstituted amino)-benzonitriles is described, and in situ functionalizations were illustrated. (C) 2008 Elsevier Ltd. All rights reserved.
[EN] 4, 5-DIHYDRO-1,3-THIAZOL-2-AMINE DERIVATIVES AND THEIR USE IN THE TREATMENT OF RESPIRATORY, CARDIOVASCULAR, NEUROLOGICAL OR GASTROINTESTINAL DISORDERS<br/>[FR] DÉRIVÉS DE 4,5-DIHYDRO-1,3-THIAZOL-2-AMINE ET LEUR UTILISATION POUR LE TRAITEMENT DE TROUBLES RESPIRATOIRES, CARDIOVASCULAIRES, NEUROLOGIQUES OU GASTROINTESTINAUX
申请人:ALBIREO AB
公开号:WO2008115141A1
公开(公告)日:2008-09-25
[EN] The present invention relates to compounds of formula (I), (XI) or (CI), to pharmaceutical compositions containing said compounds and to the use of said compounds in therapy. The present invention further relates to processes for the preparation of compounds of formula (I), (XI) or (CI) and to new intermediates used in the preparation thereof. [FR] La présente invention concerne des composés de formule (I), (XI) ou (CI), des compositions pharmaceutiques qui contiennent lesdits composés et l'utilisation desdits composés en thérapie. La présente invention concerne également des procédés de préparation de composés de formule (I), (XI) ou (CI) et de nouveaux intermédiaires utilisés dans la préparation de ces composés.
Rh(III)-Catalyzed Tandem Acylmethylation/Nitroso Migration/Cyclization of <i>N-</i>Nitrosoanilines with Sulfoxonium Ylides in One Pot: Approach to 3-Nitrosoindoles
作者:Yingtao Wu、Chao Pi、Xiuling Cui、Yangjie Wu
DOI:10.1021/acs.orglett.9b03768
日期:2020.1.17
Rh(III)-catalyzed acylmethylation and trifluoroacetic acid (TFA)-mediated nitroso transfer/cyclization cascade reaction in one pot has been developed. The N-nitroso group plays a dual role as a versatile directing group and internal nitrosation reagent. Rh(III)-catalyzed C-H activation/C-C bondformation and TFA-mediated N-N bond cleavage/formation of two C-N bonds are involved in this reaction. This