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.
An Approach to the Efficient Syntheses of Chiral Phosphino- Carboxylic Acid Esters
作者:Renta Jonathan Chew、Kristel Sepp、Bin-Bin Li、Yongxin Li、Peng-Cheng Zhu、Nguan Soon Tan、Pak-Hing Leung
DOI:10.1002/adsc.201500638
日期:2015.10.12
addition of diarylphosphines with N-enoylbenzotriazoles and analogues is described. Chiral phosphine products are obtained in 100% atom economy and without cumbersome protection–deprotection manipulations. The obtained products can be subsequently transformed to bear various functionalities, including phosphino-carboxylic esters which play critical roles in catalysis and as synthetic aids. Anti-tumour activities
The bis-addition of arylhydrazines to α,β-unsaturated N-acylbenzotriazoles to form heterocyclic compounds was achieved in refluxing THF by using triethylamine as promoter. The reaction was highly regioselective and various 2-aryl-substituted pyrazolidin-3-ones were obtained in moderate to good yields.
SmI<sub>3</sub>-Catalyzed Addition of Amines to<font>α</font>,<font>β</font>-Unsaturated<i>N</i>-Acylbenzotriazoles
作者:Xiaoxia Wang、Liang He、Zhifang Li、Wencun Wang、Junhua Liu
DOI:10.1080/00397910802431180
日期:2009.2.9
The addition of amines to ,-unsaturated N-acylbenzotriazoles could be catalyzed by samarium triiodide (SmI3) at ambient temperature. ,-Unsaturated aliphatic N-acylbenzotriazoles afforded bis-addition products (-amino amides), whereas N-cinnamoylbenzotriazoles gave acylated products (cinnamoylamides) exclusively.
Tu, Ya Wei; Zhou, Lie Jin; Lv, Xin, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2014, vol. 53, # 4, p. 435 - 439
作者:Tu, Ya Wei、Zhou, Lie Jin、Lv, Xin、Wang, Xiao Xia
DOI:——
日期:——
FeCl<sub>3</sub> · 6H<sub>2</sub>O-Catalyzed Acceleration of the Acylation of Sodium Azide with<i>N</i>-Acylbenzotriazoles
[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.