排序方式: 共有114条查询结果,搜索用时 15 毫秒
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Carrër A Florent JC Auvrouin E Rousselle P Bertounesque E 《The Journal of organic chemistry》2011,76(8):2502-2520
The synthesis of novel 3-aryl-2-arylamidobenzofurans has been accomplished via a Curtius rearrangement strategy in four steps from benzofuran-2-carboxylic acids. The requisite Suzuki-Miyaura cross-coupling, with benzyl 3-bromobenzofuran-2-ylcarbamate or 2-arylamido-3-bromobenzofurans, revealed an unusual reductive debromination process due to the presence of the free NH group. This dehalogenation can be suppressed by N-alkylation. DMAP is an efficient reagent for the one-pot conversion of benzyl benzofuran-2-ylcarbamates into the corresponding benzofuran-2-arylamides through aroylation, thus acting both as an acyl transfer reagent and a deprotecting agent of the Cbz group. A mechanism is postulated. 相似文献
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Serge Cosnier Christine Mousty Amandine Guelorget Marta Sanchez‐Paniagua Lopez Dan Shan. 《Electroanalysis》2011,23(8):1776-1779
A new concept of enzyme inhibition‐based biosensor involving the appearance of an amperometric signal for an inhibition by mercury was developed. The bienzyme sensor was composed of two layers of clay materials. The inner layer was constituted of layered double hydroxides entrapping laccase wired by ABTS. The outer laponite layer contained glucose oxidase (GOD). GOD catalyzed the glucose oxidation with the reduction of O2 into H2O2. This induced a drastic decrease of the biosensor response to O2 by the electrically wired laccase. HgCl2 inhibited the O2 consumption by GOD leading to a signal increase of the electroenzymatic reduction of O2. 相似文献
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Masahiko Yoshimura Pierre Quinodoz Lucía Reyes Méndez Amandine Kolleth Sarah Sulzer-Mossé Thomas Vent-Schmidt Ulfet Karadeniz Yezer Saron Catak Alain De Mesmaeker 《Helvetica chimica acta》2023,106(9):e202300085
Polycyclic aromatic hydrocarbons (PAHs) are an important family of molecules in science and technology. Amino-substituted PAHs are promising building blocks to create attractive molecules for materials science. However, the synthetic limitations have hampered to produce diverse structures of amino-substituted PAHs. Here we describe a novel efficient synthetic method to access amino-substituted PAHs through the electrocyclization of highly reactive keteniminium species. We demonstrated the synthesis of various amino-substituted PAHs and disclosed some of their photophysical properties. Furthermore, combination with theoretical calculation revealed that the multiple electrocyclization reactions of keteniminium species is a stepwise process and the fusion of additional aromatic ring to the substrate accelerates the electrocyclization. 相似文献