Potassium permanganate/carboxylic acid/organic solvent: a powerful reagent for enone oxidation and aryl coupling reactions
作者:Ayhan S. Demir、Hamide Findik
DOI:10.1016/j.tet.2008.05.004
日期:2008.6
with potassiumpermanganate and acetic acid, in which acetoxylation products were obtained in 74–96% yields. The same reaction was carried out with carboxylic acids other than acetic acid, which furnished corresponding acyloxy ketones with the same regioselectivity. For the first time, formyloxylation products were synthesized in a 61–85% yield by using formic acid. The potassiumpermanganate and acetic
Enantioselective Synthesis of Vicinal Halohydrins via Dynamic Kinetic Resolution
作者:Abel Ros、Antonio Magriz、Hansjörg Dietrich、Rosario Fernández、Eleuterio Alvarez、José M. Lassaletta
DOI:10.1021/ol052821k
日期:2006.1.1
[reaction: see text] Expanding the scope of enantioselective catalysis via DKR, transfer hydrogenation of a variety of cyclic alpha-halo ketones was accomplished using the Noyori/Ikariya (R,R)- or (S,S)-I catalysts and either HCO(2)H/Et(3)N or HCO(2)Na/n-Bu(4)NBr in H(2)O/CH(2)Cl(2) as the hydrogen sources. Good yields of vicinal bromo-, chloro-, and fluorohydrins with excellent de and ee levels were
One‐Pot Synthesis of α‐Formyloxy Ketones from Enolizable Ketones
作者:Sunil Kumar、Ashok Kumar、Rakesh K. Gupta、Devinder Kumar
DOI:10.1080/00397910701767049
日期:2008.1.1
One-pot synthesis of alpha-formyloxy tones as well as alpha-acetoxy ketones from enolizable ketones and [hydroxy(tosyloxy)iodo] benzene (HTIB)/polymer supported [hydroxy(tosyloxy)iodo]benzene (PSHTIB) in N,N - dimethylformamide (DMF)/N,N - dimethylacetamide (DMA) in high yields is described.