Reengineering a Reversible Covalent-Bonding Assembly to Optically Detect ee in β-Chiral Primary Alcohols
作者:Matthew B. Minus、Aaron L. Featherston、Sooyun Choi、Sam C. King、Scott J. Miller、Eric V. Anslyn
DOI:10.1016/j.chempr.2019.10.003
日期:2019.12
The use of parallel synthesis protocols for asymmetric reaction discovery has increased the need for new methods to rapidlydetermineenantiomericexcess (ee) values. Most chirality sensing is performed on stereocenters that are α (i.e., proximal) to the target functional group. Finding a general approach to detect more distant point chirality would increase the substrate scope of such assays. Herein
Safe and practical ex-situ chlorination of electronically diverse π-systems
作者:Glen C. Aguilar、Patrycja A. Lis、Dan E. Wise、Jenny S. Martinez、Marvin Parasram
DOI:10.1016/j.tetlet.2023.154591
日期:2023.7
Directchlorination of organic molecules is a powerful tool in organic synthesis. However, the employment of Cl2 gas has some significant safety and logistical drawbacks. Recently, in-situ chlorination procedures have been developed to circumvent these limitations; however, these approaches require the use of harsh or expensive reagents and are limited in substrate scope. Herein we describe a safe
Reaction of Aromatic and Unsaturated Compounds with the Potassium Permanganate/HCl (HBr) Acetonitrile Reagent
作者:Lilian Kao Liu、Ching-Shan Lin
DOI:10.1002/jccs.199600010
日期:1996.2
AbstractAddition of hydrochloric or hydrobromic acid to a solution of potassium permanganate in acetonitrile produced a homogeneous mixture, which is suitable for laboratory chlorination or bromination, respectively. Aromatic compounds more reactive than alkylbenzenes can be chlorinated or brominated without additional catalyst. Alkenes and alkynes give the corresponding vicinal dihaloalkanes and vinyl halides. All reactions complete within two hours under mild condition (25‐60 °C) with excellent to moderate yields.