Unprecedented Formation of 2,5-Diaminoquinones from the Reaction of Vanillin with Secondary Amines in Aerobic Conditions
作者:Mauro Barbero、Valentina A. Papillo、Ambra A. Grolla、Roberto Negri、Fabiano Travaglia、Matteo Bordiga、Fabrizio Condorelli、Marco Arlorio、Giovanni B. Giovenzana
DOI:10.1002/ejoc.201901553
日期:2020.1.9
The Colour of the Flavour: Vanillin reacts with secondaryamines in aerobic conditions to give highly colored 2,5‐diamino‐1,4‐benzoquinones. This unprecedented transformation is potentially operative during food processing. MTT tests dismiss toxicity concerns on the products even at 0.1 mm.
风味的颜色:香兰素在有氧条件下与仲胺反应,生成高度着色的2,5-二氨基-1,4-苯醌。这种前所未有的转变可能在食品加工过程中起作用。MTT测试消除了产品在0.1 m m时的毒性问题。
Micelles catalyzed chemo- and regio-selective one pot and one step synthesis of 2,3,5,6-tetrakis(alkyl and arylsulfanyl)-1,4-benzoquinones and 2,5-diaminosubstituted-1,4-benzoquinones “In-Water” and their biological evaluation as antibacterial and antifungal agents
作者:Vishnu K. Tandon、Sandeep Kumar、Nripendra N. Mishra、Praveen K. Shukla
DOI:10.1016/j.ejmech.2012.07.022
日期:2012.10
Chemo- and regio-selective one pot and one step synthesis of novel 2,3,5,6-tetrakis (substituted thio) cyclohexa-2,5-diene-1,4-diones (4d-14), 2,5-dichloro-3,6-diaminocyclohexa-2,5-diene-1,4-diones and 2,5-diaminocyclohexa-2,5-diene-1,4-diones (16) by economical green methodology approach using LD (Laundry detergent) as a catalyst "In-Water" by nucleophilic addition and substitution reactions of 1,4-benzoquinone and chloranil with sulfur and nitrogen nucleophiles in high yields has been demonstrated. The antifungal profile of 4 and 16 indicates that compounds 4d and 16f had better antifungal activity compared to clinically prevalent antifungal drugs Fluconazole, 5-Fluorocytosine and Clotrimazole against Sporothrix schenckii and Trichophyton mentagraphytes. 16f had also been found to possess better antibacterial activity compared to Ampicillin in vitro against Escherichia coli, Staphylococcus aureus and Klebsiella pneumoniae. Compound 16f did not exhibit any toxicity towards mammalian cells L929. (C) 2012 Elsevier Masson SAS. All rights reserved.