FeCl3 · 6H2O-Catalyzed Acceleration of the Acylation of Sodium Azide withN-Acylbenzotriazoles
摘要:
[image omitted] Catalyzed by ferric chloride hexahydrate (FeCl3 center dot 6H2O), the acylation of sodium azide with N-acylbenzotriazoles was greatly accelerated in a mixed solvent of acetone and water. Thus, good to excellent yields of a variety of acyl azides were obtained at room temperature in a short time. Furthermore, because of the complete conversion of N-acylbenzotriazoles and the easy removal of the by-product, purification by column chromatography was no longer required, which made the protocol suitable for large-scale preparation.
N-Acylbenzotriazoles as Proficient Substrates for an Easy Access to Ureas, Acylureas, Carbamates, and Thiocarbamates via Curtius Rearrangement Using Diphenylphosphoryl Azide (DPPA) as Azide Donor
作者:Vinod K. Tiwari、Mangal S. Yadav、Sumt K. Singh、Anand K. Agrahari、Anoop S. Singh
DOI:10.1055/a-1399-3823
日期:2021.7
found to be a good alternative to trimethylsilyl azide and sodium azide for the azide donor in Curtius degradation. The high reaction yields, one-pot and metal-free conditions, straightforward nature, easy handling, use of readily available reagents, and in many cases avoidance of column chromatography are the notable features of the devised protocol.
Nickel-Catalyzed Reductive Cross-Coupling of <i>N</i>-Acyl and <i>N</i>-Sulfonyl Benzotriazoles with Diverse Nitro Compounds: Rapid Access to Amides and Sulfonamides
作者:Erdong Qu、Shangzhang Li、Jin Bai、Yan Zheng、Wanfang Li
DOI:10.1021/acs.orglett.1c03535
日期:2022.1.14
Herein we report a Ni-catalyzed reductive transamidation of conveniently available N-acyl benzotriazoles with alkyl, alkenyl, and aryl nitro compounds, which afforded various amides with good yields and a broad substrate scope. The same catalytic reaction conditions were also applicable for N-sulfonyl benzotriazoles, which could undergo smooth reductive coupling with nitroarenes and nitroalkanes to
在此,我们报道了一种方便获得的N-酰基苯并三唑与烷基、烯基和芳基硝基化合物的 Ni 催化还原转酰胺基反应,该反应以良好的收率和广泛的底物范围提供了各种酰胺。相同的催化反应条件也适用于N-磺酰基苯并三唑,它可以与硝基芳烃和硝基烷烃进行平滑的还原偶联,得到相应的磺酰胺。
Novel synthesis of benzotriazolyl alkyl esters: an unprecedented CH<sub>2</sub> insertion
作者:Mohamed Elagawany、Lingaiah Maram、Bahaa Elgendy
DOI:10.1039/d0ra10413b
日期:——
We have developed a novel method for the synthesis of benzotriazolyl alkylesters (BAEs) from N-acylbenzotriazoles and dichloromethane (DCM) under mild conditions. This reaction is one of few examples to show the use of DCM as a C-1 surrogate in carbon-heteroatom bond formation and to highlight the versatility of using DCM as a methylene building block.
anhydrous dichloromethane in the presence of 1H-benzotriazole. Mild reaction conditions, short reaction time, easy in handling, wide substrate scope, availability of reagents involved, and moreover avoiding the use of base makes this protocol quite useful for the laboratory practices for N-acylbenzotriazole synthesis. A novel path has been developed for the conversion of carboxylic acids into the corresponding
salient features of the developed reaction path include an economic, facile, base-free, and equally useful method in milligram to gram scale. N-Acylbenzotriazoles are achieved in good yields from the corresponding carboxylic acids by using only 0.35 equivalent of trichloroisocyanuric acid and 1.2 equivalents of PPh3. The salient features of the developed reaction path include an economic, facile, base-free
这份手稿专门献给(后期)Alan R. Katritzky教授对苯并三唑化学的贡献。 抽象的 通过仅使用0.35当量的三氯异氰尿酸和1.2当量的PPh 3,由相应的羧酸以良好的产率获得N-酰基苯并三唑。发达的反应路径的显着特征包括一种经济,简便,无碱且在毫克到克范围内同样有用的方法。 通过仅使用0.35当量的三氯异氰尿酸和1.2当量的PPh 3,由相应的羧酸以良好的产率获得N-酰基苯并三唑。发达的反应路径的显着特征包括一种经济,简便,无碱且在毫克到克范围内同样有用的方法。