α-Diazo-β-ketonitriles: Uniquely Reactive Substrates for Arene and Alkene Cyclopropanation
摘要:
An investigation of the intramolecular cyclopropanation reactions of alpha-diazo-beta-ketonitriles is reported. These studies reveal that alpha-diazo-beta-ketonitriles exhibit unique reactivity in their ability to undergo arene cyclopropanation reactions; other similar acceptor acceptor-substituted diazo substrates instead produce mixtures of C-H insertion and dimerization products. alpha-Diazo-beta-ketonitriles also undergo highly efficient intramolecular cyclopropanation of tri- and tetrasubstituted alkenes. In addition, the alpha-cyano-alpha-ketocyclopropane products are demonstrated to serve as substrates for S(N)2, S(N)2', and aldehyde cycloaddition reactions.
A nitroenolate approach to the synthesis of 4,5-disubstituted-2-aminoimidazoles. Pilot library assembly and screening for antibiotic and antibiofilm activity
作者:Zhaoming Su、Steven A. Rogers、W. Steve McCall、Alicia C. Smith、Sindhu Ravishankar、Trey Mullikin、Christian Melander
DOI:10.1039/c001479f
日期:——
A library of 4,5-disubstituted-2-aminoimidazoles was synthesized using a nitroenolate route and then screened for antibiofilm and antimicrobial activity. These compounds displayed notable biofilm dispersal and planktonic microbicidal activity against various Gram-positive and Gram-negative bacteria.
Inhibition of bacterial biofilms and microbial growth with imidazole derivatives
申请人:North Carolina State University
公开号:US09295257B2
公开(公告)日:2016-03-29
Disclosure is provided for imidazole derivative compounds useful to inhibit the formation of biofilms and/or inhibit microbial growth, compositions including these compounds, devices including these compounds, and methods of using the same.
Oxidative Synthesis of α‐Nitroketones from α‐Substituted Malononitrile and Nitromethane Using Molecular Oxygen without Condensation Reagents
作者:Yujiro Hayashi、Emanuele Cocco、Hinata Odaira、Hiroaki Matoba、Naoki Mori
DOI:10.1002/ejoc.202300964
日期:2024.2.12
A new and feasible oxidative synthetic method for α-nitroketones from α-substituted malononitriles and nitromethane under molecular oxygen has been developed. This provides an environmentally friendly synthesis of α-nitroketones using only base and molecular oxygen, without the need for any condensation reagents. The method avoids the use of dangerous and highly polluting chemicals enabling a safe