Chemoselective Oxidation of Equatorial Alcohols with N-Ligated λ<sup>3</sup>-Iodanes
作者:Myriam Mikhael、Sophia A. Adler、Sarah E. Wengryniuk
DOI:10.1021/acs.orglett.9b02018
日期:2019.8.2
of nitrogen-ligated (bis)cationic λ3-iodanes (N-HVIs) for alcoholoxidation and their unprecedented levels of selectivity for the oxidation of equatorial over axial alcohols. The conditions are mild, and the simple pyridine-ligated reagent (Py-HVI) is readily synthesized from commercial PhI(OAc)2 and can be either isolated or generated in situ. Conformational selectivity is demonstrated in both flexible
Microwave-Enhanced Coupling of Carboxylic Acids with Liquid Ketones and Cyclic Ethers Using Tetrabutylammonium Iodide/<i>t</i>-Butyl Hydroperoxide
作者:Pablo Macías-Benítez、F. Javier Moreno-Dorado、Francisco M. Guerra
DOI:10.1021/acs.joc.0c00519
日期:2020.5.1
The oxidative coupling of carboxylic acids with liquid ketones and cyclic ethers has been accomplished in minutes using t-butylhydroperoxide in the presence of tetrabutylammonium iodide under microwave irradiation in the absence of a solvent. In addition to drastically shortening the reaction times, the use of microwaves resulted, in general, in yields equal to or higher than those obtained by conventional
A Multicatalyst System for the One‐Pot Desymmetrization/Oxidation of
<i>meso</i>
‐1,2‐Alkane Diols
作者:Christian E. Müller、Radim Hrdina、Raffael C. Wende、Peter R. Schreiner
DOI:10.1002/chem.201100498
日期:2011.5.27
Two is better than one: We demonstrate the viability of an organocatalytic reaction sequence along a short peptide backbone that carries two independent catalytic functionalities, which allow the rapid, one‐pot acylative desymmetrization and oxidation of meso‐alkane‐1,2‐diols to the corresponding acetylated acetoins with good yields and enantioselectivities (see scheme).
Chlorierungsreaktionen mit den systemen Pb-IV-acetat-(CH3)3SiCl und Pb-IV-acetat—CH3COCl
作者:E. Zbiral、K. Kischa
DOI:10.1016/s0040-4020(01)82727-7
日期:1969.1
Multiple bonds react with the title systems to give 1,2-dichlorocompounds. 1-Acetoxy-2-chlorocompounds are formed as typical byproducts. The stereochemistry of the addition varies from mainly cis to exclusively trans. Simple ketones give α-monochlorketones in good yields.