N-磺酰基和N-氨磺酰基叠氮化物与末端炔烃的环加成通常通过烯酮亚胺中间体产生酰胺衍生物。我们在此描述了一种使用脯氨酰胺配体的Cu( I ) 催化方法,该方法通过抑制 5-铜三唑中间体的N 1 -N 2键的裂解,在水介质中选择性生成 N -磺酰基和氨磺酰三唑。本方法温和且耐空气、湿气和多种官能团,从而可以轻松获得各种三唑产品。
Rhodium(
<scp>II</scp>
)‐Catalyzed [4+3] Cyclization of Triazoles with Indole Derivatives and Its Application in the Total Synthesis of (±)‐Aurantioclavine
作者:Shengguo Duan、Bing Xue、Hui Meng、Zihang Ye、Ze‐Feng Xu、Chuan‐Ying Li
DOI:10.1002/cjoc.202000657
日期:2021.5
rhodium(II)‐catalyzed [4+3] cyclization reaction of 1‐sulfonyl‐1,2‐3‐triazoles and indoles was developed. Azepino[5,4,3‐ cd]indoles, which are widely distributed in ergot alkaloids with various biological activities, could be obtained in good to excellent yields. In addition, the total synthesis of (±)‐aurantioclavine was completed in four steps from the known compound 1a adopting this [4+3] cyclization as a key step
开发了有效的铑(II)催化的1-磺酰基-1,2-3-3三唑和吲哚的[4 + 3]环化反应。可以以良好或极好的收率获得阿斯皮诺[5,4,3- cd ]吲哚,广泛分布在具有各种生物活性的麦角生物碱中。此外,采用这种[4 + 3]环化作为关键步骤,从已知化合物1a的四个步骤中完成了(±)-金葡糖醇的总合成。
Rhodium-Catalyzed Denitrogenative [2,3] Sigmatropic Rearrangement: An Efficient Entry to Sulfur-Containing Quaternary Centers
作者:Dongari Yadagiri、Pazhamalai Anbarasan
DOI:10.1002/chem.201302653
日期:2013.11.4
blocks: α‐Sulfenylated imines containing a quaternary center, an ubiquitous subunit and excellent building block, were achieved by rhodium‐catalyzed denitrogenative [2,3] sigmatropic rearrangements of N‐sulfonyl‐1,2,3‐triazoles with allylaryl(alkyl) sulfides. Coupling of this methodology with a copper‐catalyzed cycloaddition reaction provides a platform for the direct regioselective functionalization of
Copper(I)–N-Heterocyclic Carbene Complexes as Efficient Catalysts for the Synthesis of 1,4-Disubstituted 1,2,3-Sulfonyltriazoles in Air
作者:Faïma Lazreg、Catherine S. J. Cazin
DOI:10.1021/acs.organomet.7b00506
日期:2018.3.12
Bis-NHC and mixed NHC/PR3 copper(I) complexes (NHC = N-heterocyclic carbene) were found to be efficientcatalysts enabling the azide–alkyne cycloaddition reaction leading to the formation of 1,2,3-sulfonyltriazoles under Click conditions. The mechanism of this transformation was probed and decoordination of the NHC ligand (even in the NHC/PR3 mixed ligand systems) during the catalytic transformation
Rhodium-Catalyzed Synthesis of 2,5-Epoxybenzo[<i>f</i>][1,4]oxazepines by Tandem Reaction of 1-Sulfonyl-1,2,3-triazoles and Salicylaldehydes
作者:Yinping Shi、Xing Yu、Chuan-Ying Li
DOI:10.1002/ejoc.201500912
日期:2015.9
Readily available 1-sulfonyl-1,2,3-triazoles were converted into α-imino carbenes in the presence of catalytic amounts of rhodium(II) salts. The carbenes underwent a tandemreaction with salicylaldehydes to provide a series of functionalized 2,5-epoxybenzo[f][1,4]oxazepines in high yields.
在催化量的铑 (II) 盐的存在下,容易获得的 1-磺酰基-1,2,3-三唑被转化为 α-亚氨基卡宾。卡宾与水杨醛发生串联反应,以高产率提供一系列功能化的 2,5-环氧苯并 [f][1,4] 氧氮杂。
Synthesis of β-Amino-α,β-unsaturated Ketone Derivatives via Sequential Rhodium-Catalyzed Sulfur Ylide Formation/Rearrangement
作者:Jun He、Zengming Man、Yinping Shi、Chuan-Ying Li
DOI:10.1021/acs.joc.5b00521
日期:2015.5.1
a Rh(II) catalyst and β-(methylthio)-α,β-unsaturated ketones, 1-sulfonyl-1,2,3-triazoles can be converted into functionalized β-amino-α,β-unsaturated ketones via formation of α-imino rhodium carbene/sulfur ylide and subsequent rearrangement. The products decompose to useful 2-methylthiopyrrole derivatives conveniently in high yield.