15885-06-0Relevant academic research and scientific papers
Metal and Oxidant Free Construction of Substituted- and/or Polycyclic Indoles: A Useful Alternative to Bischler and Related Syntheses
De Crescentini, Lucia,Favi, Gianfranco,Mantellini, Fabio,Mari, Giacomo,Santeusanio, Stefania
, (2020)
A wide range of substituted indoles or polycyclic derivatives containing the indole core are easily accessible by acidic treatment of aromatic amines and 1,2-diaza-1,3-dienes. Unlike the related indole-Bischler synthesis, the regioselectivity of the method here reported is unique and predictable, the yields are generally good and also electron withdrawing substituted indoles are smoothly recovered.
Ru-Catalyzed Switchable N-Hydroxyethylation and N-Acetonylation with Crude Glycerol
Xin, Zhuo,Jia, Le,Huang, Yuxing,Du, Chen-Xia,Li, Yuehui
, p. 2007 - 2011 (2020/03/19)
Highly efficient Ru-catalyzed selective C?C or C?O bond cleavage of polyols (e.g., crude glycerol) for N-hydroxyethylation or N-acetonylation of amines was achieved through the hydrogen-borrowing approach. A variety of amines were transformed to the desired amino alcohols/ketones in moderate-to-excellent yields, opening up new avenues for generation of oxygenated pharmaceuticals and fine chemicals from renewable raw materials. The use of new redox-active catalysts containing bisphosphine/thienylmethylamine ligands allows this hydrogen-borrowing system to be operated selectively under both basic and acidic conditions.
Direct hydroxyethylation of amines by carbohydrates: Via ruthenium catalysis
Jia, Le,Makha, Mohamed,Du, Chen-Xia,Quan, Zheng-Jun,Wang, Xi-Cun,Li, Yuehui
, p. 3127 - 3132 (2019/06/18)
An efficient and halogen-free catalytic methodology for the synthesis of β-amino alcohols from aromatic amines and biomass-derived carbohydrates is demonstrated for the first time. The activation of C5/C6 sugars by a ruthenium catalyst selectively generates the C2 alkylating reagent glycolaldehyde. The transformation involves metal-catalyzed hydrogen borrowing for the reduction of the imine intermediate. A series of arylamines bearing various substituents were successfully transformed into the desired products in good to excellent yields.
Preparation method of N-acetonyl amine compound
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Paragraph 0046, (2016/10/09)
The invention discloses a preparation method of an N-acetonyl amine compound. The method comprises the following steps that an amine compound and glycerin are used as reaction raw materials, and in the presence of a composite catalyst and an alkali addition agent, in reaction mediums and at the reaction temperature of 80-180 DEG C, a reaction is performed for 2-48 hours in a sealed reactor so that the N-acetonyl amine compound is obtained. The method disclosed by the invention is simple, reaction conditions are mild, target products can be obtained at a low cost and at a high yield, and the used catalyst has high catalytic activity and is easy to separate and repeatedly use in a reaction system; besides, the whole process is environment-friendly, and the utilization of by-products namely the glycerin of biologic diesel oil is promoted.
Bioconjugatable azo-based dark-quencher dyes: Synthesis and application to protease-activatable far-red fluorescent probes
Chevalier, Arnaud,Massif, Cédrik,Renard, Pierre-Yves,Romieu, Anthony
, p. 1686 - 1699 (2013/04/10)
We describe the efficient synthesis and one-step derivatization of novel, nonfluorescent azo dyes based on the Black Hole Quencher-3 (BHQ-3) scaffold. These dyes were equipped with various reactive and/or bioconjugatable groups (azido, α-iodoacetyl, keton
A NEW SYNTHESIS OF 3-SUBSTITUTED INDOLINES AND INDOLES
Kihara, Masaru,Iwai, Yasumasa,Nagao, Yoshimitsu
, p. 2279 - 2288 (2007/10/03)
3-Phenyl- and 3-alkyl-3-hydroxyindolines were synthesized by intramolecular Barbier reaction of phenyl and alkyl N-(2-iodophenyl)-N-methylaminomethyl ketones with n-BuLi, which were easily prepared from N-methyl-2-iodoaniline and bromomethyl ketones.The treatment of the indolines with acid gave the corresponding indoles in quantitative yields.
Synthesis and Properties of Cyclic Keto Alkenylammonium Salts
Jung, Michael E.,Love, Brian E.
, p. 1288 - 1290 (2007/10/02)
The cyclic keto alkenylammonium salts (4)-(8) have been prepared by a short, general route and their acidic and electrophilic properties examined.
