A Simple One-Pot Procedure for the Direct Conversion of Alcohols to Azides via Phosphate Activation
作者:Chengzhi Yu、Bin Liu、Longqin Hu
DOI:10.1021/ol0060376
日期:2000.6.1
A one-pot procedure was developed to prepare efficiently alkyl azides from alkanols using bis(2,4-dichlorophenyl) phosphate activation. 4-(Dimethylamino)pyridine was used as a base, and phosphorylpyridinium azide is believed to be the activating agent under this condition.
An Investigation of the Reactions between Azido Alcohols and Phosphoramidites
作者:Jian Wu、Lee Bishop、Jiatong Guo、Zhongwu Guo
DOI:10.1055/s-0037-1611461
日期:2019.2
The reactions of several β-, γ-, and δ-azido alcohols with dibenzyl and dimethyl N,N-diisopropylphosphoramidites were examined. Detailed analysis of the intermediates and products formed from the reactions under different conditions provided useful information to gain insights into their mechanisms involving intramolecular Staudinger reaction, as well as the structure-reactivity relationships of both
Click-Connected Ligand Scaffolds: Macrocyclic Chelates for Asymmetric Hydrogenation
作者:Qing Zhang、James M. Takacs
DOI:10.1021/ol702890s
日期:2008.2.1
Click chemistry is used to construct ligand scaffolds for a series of chiral diphosphites. Enantioselectivity as high as 97% ee is obtained using these click ligands in rhodium-catalyzed asymmetric hydrogenation. Control experiments and spectroscopic data suggest that a 16-membered PP-macrocyclic Rh(I) chelate is formed.
A Structurally Diverse Library of Polycyclic Lactams Resulting from Systematic Placement of Proximal Functional Groups