Gold(<scp>i</scp>)-catalyzed cross-coupling reactions of aryldiazonium salts with organostannanes
作者:Manjur O. Akram、Popat S. Shinde、Chetan C. Chintawar、Nitin T. Patil
DOI:10.1039/c8ob00630j
日期:——
Gold(I)-catalyzed cross-couplingreactions of aryldiazonium salts with organostannanes are described. This redox neutral strategy offers an efficient approach to diverse biaryls, vinyl arenes and arylacetylenes. Monitoring the reaction with NMR and ESI-MS provided strong evidence for the in situ formation of Ph3PAuIR (R = aryl, vinyl and alkynyl) species which is crucial for the activation of aryldiazonium
描述了金(I)催化的芳基重氮盐与有机锡烷的交叉偶联反应。这种氧化还原中性策略为各种联芳基,乙烯基芳烃和芳基乙炔提供了一种有效的方法。用NMR和ESI-MS监测反应为原位形成Ph 3 PAu I R(R =芳基,乙烯基和炔基)物种提供了有力证据,这对于激活芳基重氮盐至关重要。
Synthesis of Tetrasubstituted Alkenes through a Palladium-Catalyzed Domino Carbopalladation/CH-Activation Reaction
作者:Lutz F. Tietze、Tim Hungerland、Alexander Düfert、Ina Objartel、Dietmar Stalke
DOI:10.1002/chem.201103209
日期:2012.3.12
Helicaltetrasubstitutedalkenes (7) were obtained in a highly efficient way through a palladium‐catalyzed domino‐carbopalladation/CH‐activation reaction of propargylic alcohols 6 in good to excellent yields. Electron‐withdrawing‐ and electron‐donating substituents can be introduced onto the upper and lower aromatic rings. The substrates (6) for the domino process were synthesized by addition of the
A rapid and efficient SnCl2·2H2O mediated synthesis of quinolines and indazoles has been developed using A3-coupling followed by reductive cyclization. The key highlights are the formation of quinoline in a one-pot fashion and indazole through N–N bond formation.
[FR] INHIBITEURS DES SÉRINE HYDROLASES DE TYPE N1- ET N2-CARBAMOYL-1,2,3-TRIAZOLE ET MÉTHODES ASSOCIÉES
申请人:SCRIPPS RESEARCH INST
公开号:WO2012138877A1
公开(公告)日:2012-10-11
The present invention provides inhibitors of a wide variety of serine hydrolase enzymes. The inhibitors of the present invention are N1- and N2-carbamoyl-1,2,3-triazole compounds such as those of Formula (I): (Formula (I)) in which N1, N2 and N3 are the nitrogen atoms at positions 1, 2, and 3, respectively, of the triazole ring, and R4, R5, R6, and R7 in Formula (I) are as described herein. Methods of inhibiting serine hydrolase enzymes and methods of preparing carbamoyl-1,2,3-triazole compounds also are described.
A radical cascade reaction of 2-aryloxy phenylacetylenes with phosphineoxides promoted by K2S2O8 was developed, which provided diphosphonyl xanthenes as products. This reaction proceeds under transition metal-free and mild conditions with simple operation and good yields. The mechanistic study indicated that phosphineoxide was induced into a phosphonyl radical, and then the following double radical
开发了由 K 2 S 2 O 8促进的 2-芳氧基苯乙炔与氧化膦的自由基级联反应,得到二膦酰基呫吨产物。该反应在无过渡金属、温和条件下进行,操作简单,收率良好。机理研究表明,氧化膦被诱导为膦酰基自由基,随后与2-芳氧基苯乙炔的双自由基加成/环化生成双膦酰基氧杂蒽。