An Opportunity for Mg-Catalyzed Grignard-Type Reactions: Direct Coupling of Benzylic Halides with Pinacolborane with 10 mol % of Magnesium
作者:Christine Pintaric、Sandra Olivero、Yves Gimbert、Pierre Y. Chavant、Elisabet Duñach
DOI:10.1021/ja1052973
日期:2010.9.1
Mg in catalytic amounts as the only metal permits the reductive coupling between benzyl halides and pinacolborane. HBpin acts both as an electrophile and as a reducing agent to regenerate an organomagnesium species in situ. An hydride oxidation mechanism is proposed on the basis of DFT calculations.
precursors containing both an amino and a nitro functionality, azo polymers are prepared on surface via highly efficient nitro‐amino cross‐coupling. Experiments conducted on other substrates and surface orientations reveal that the metal surface has a significant effect on the reaction efficiency. The reaction was further found to proceed from partially oxidized/reduced precursors in dimerization reactions
Miyaura Borylations of Aryl Bromides in Water at Room Temperature
作者:Bruce H. Lipshutz、Ralph Moser、Karl R. Voigtritter
DOI:10.1002/ijch.201000045
日期:2010.12
New technology for palladium‐catalyzed cross‐couplings between B2pin2 and arylbromides leading to arylboronates is described. Micellar catalysis serves to enable borylations to take place in water as the only medium at ambient temperatures.
描述了钯催化 B 2 pin 2和芳基溴化物之间交叉偶联产生芳基硼酸酯的新技术。胶束催化作用是使硼酸化能够在环境温度下在作为唯一介质的水中发生。
2-Aryl-indenylphosphine ligands: design, synthesis and application in Pd-catalyzed Suzuki–Miyaura coupling reactions
A focused library of phosphine ligands was constructed for structural optimization. The catalyst can be used to perform the Suzuki–Miyaura cross-coupling reaction of aryl and heteroaryl chlorides.
[EN] LINEAR PEPTIDE ANTIBIOTICS<br/>[FR] ANTIBIOTIQUES À PEPTIDE LINÉAIRE
申请人:RQX PHARMACEUTICALS INC
公开号:WO2013123456A1
公开(公告)日:2013-08-22
Provided herein are antibacterial compounds, wherein the compounds in some embodiments have broad spectrum bioactivity. The compounds provided herein can in other embodiments overcome the resistance conferred by single amino acid mutations at defined positions of bacterial Signal Peptidases (SPases) and in other embodiments provide for a broad spectrum of antibiotic bioactivity. Pharmaceutical compositions and methods for treatment using the compounds described herein are also provided.