14572-92-0Relevant articles and documents
Hydrazine Hydrate Accelerates Neocuproine–Copper Complex Generation and Utilization in Alkyne Reduction, a Significant Supplement Method for Catalytic Hydrogenation
Chen, Guoliang,He, Xiaoyan,Huang, Gang,Lu, Xiuhong,Wang, Jincheng,Yang, Zhenjiao,Zhang, Yongsheng,Zhang, Zeng
, p. 17696 - 17709 (2021/12/09)
Diimine (HN═NH) is a strong reducing agent, but the efficiency of diimine oxidized from hydrazine hydrate or its derivatives is still not good enough. Herein, we report an in situ neocuproine–copper complex formation method. The redox potential of this complex enable it can serve as an ideal redox catalyst in the synthesis of diimine by oxidation of hydrazine hydrate, and we successfully applied this technique in the reduction of alkynes. This reduction method displays a broad functional group tolerance and substrate adaptability as well as the advantages of safety and high efficiency. Especially, nitro, benzyl, boc, and sulfur containing alkynes can be reduced to the corresponding alkanes directly, which provides a useful complementary method to traditional catalytic hydrogenation. Besides, we applied this method in the preparation of the Alzheimer’s disease drug CT-1812 and studied the mechanism.
Plasma induced acceleration and selectivity in strain-promoted azide-alkyne cycloadditions
Warther, David,Dursun, Enes,Recher, Marion,Ursuegui, Sylvain,Mosser, Michel,Sobska, Joanna,Krezel, Wojciech,Chaubet, Guilhem,Wagner, Alain
supporting information, p. 5063 - 5067 (2021/06/21)
Strain-promoted azide-alkyne cycloaddition (SPAAC) is an important member of the bioorthogonal reaction family. Over the past decade, much work has been dedicated to the generation of new strained alkynes with improved reactivity. While kinetics studies of SPAAC are often conducted in organic solvents, buffered solutions or mixtures, these media do not reflect the complexity ofin vivosystems. In this work, we show that performing SPAAC in human plasma leads to intriguing kinetics and selectivity effects. In particular, we observed that reactions in plasma could be accelerated up to 70-fold compared to those in methanol, and that selective couplings between a pair of reagents could be possible in competition experiments. These findings highlight the value of evaluating bioorthogonal reactions in such a complex medium, especially whenin vivoapplications are planned, as unsuspected behaviour can be observed, disrupting the usual rules governing the reactivity in simple solvent systems.
Identification of Novel Triazole-Based Nicotinamide Phosphoribosyltransferase (NAMPT) Inhibitors Endowed with Antiproliferative and Antiinflammatory Activity
Travelli, Cristina,Aprile, Silvio,Rahimian, Reza,Grolla, Ambra A.,Rogati, Federica,Bertolotti, Mattia,Malagnino, Floriana,Di Paola, Rosanna,Impellizzeri, Daniela,Fusco, Roberta,Mercalli, Valentina,Massarotti, Alberto,Stortini, Giorgio,Terrazzino, Salvatore,Del Grosso, Erika,Fakhfouri, Gohar,Troiani, Maria Pia,Alisi, Maria Alessandra,Grosa, Giorgio,Sorba, Giovanni,Canonico, Pier Luigi,Orsomando, Giuseppe,Cuzzocrea, Salvatore,Genazzani, Armando A.,Galli, Ubaldina,Tron, Gian Cesare
, p. 1768 - 1792 (2017/03/17)
Nicotinamide phosphoribosyltransferase (NAMPT) is a key enzyme involved in the recycling of nicotinamide to maintain adequate NAD levels inside the cells. It has been postulated to be a pharmacological target, as it is overexpressed in cancer cells as well as in inflammatory diseases. We describe the synthesis and characterization of a novel class of one-digit nanomolar NAMPT inhibitors based on in vitro characterization. The most active compound tested, 30c, displayed activity in xenograft and allograft models, strengthening the potential of NAMPT inhibitors as antitumoral drugs. Furthermore, in the present contribution we describe the ability of 30c to significantly improve the outcome of colitis in mice. Given that this is the first report of an effect of NAMPT inhibitors in colitis, this result paves the way for novel applications for this class of compounds.
