A simple one-pot synthesis of β-alkoxy alcohols from alkenes
作者:Jean Le Bras、Debabrata Chatterjee、Jacques Muzart
DOI:10.1016/j.tetlet.2005.05.030
日期:2005.7
β-Methoxy alcohols are easily obtained from the one-pot reaction of alkenes with oxone® in methanol, in the absence of any additive or catalyst. The use of other alcohols as solvents has shown that the efficiency of the process decreases with the steric hindrance of the alcohol.
Highly Efficient, Regio- and Stereoselective Alcoholysis of Epoxides Catalyzed with Iron(III) Chloride
作者:N. Iranpoor、P. Salehi
DOI:10.1055/s-1994-25661
日期:——
An efficient, catalytic, simple and mild method for the conversion of epoxides into their corresponding ß-alkoxy alcohols was performed in primary, secondary and tertiary alcohols and in the presence of catalytic amounts of ferric chloride. The ß-alkoxy alcohols were obtained with high stereo- and regioselectivity and in good to excellent yields.
FeCl3•6H2O absorbed on chromatographic silica gel can act as an efficient catalyst for alcoholysis, hydrolysis and acetolysis of epoxides. Methanolysis of (R)-styrene oxide proceeds with high stereospecificity and in excellent yield. This catalyst can also convert epoxides to their corresponding β-halohydrins and β-nitrato alcohols in the presence of chloride, bromide and nitrate ions respectively.
The photolysis of α-alkoxycyclohexanones and α-alkoxycyclopentanones in ethanol involves NII elimination of an alkoxy group. The proportion of cyclanone is higher when starting from α-alkoxycyclohexanones, and esters are isolated in low yields. No ester, but aldehydes are obtained from α-alkoxycyclopentanones. By photolysis of 2-methoxy norbornanone, only epimerisation is detected. Oxetanols are formed
Electrogenerated Acid as an Efficient Catalyst for Alcoholyses and Hydrolyses of Epoxides
作者:Afsaneh Safavi、Nasser Iranpoor、Lida Fotuhi
DOI:10.1246/bcsj.68.2591
日期:1995.9
The electrochemical transformation of different epoxides to their corresponding β-alkoxy alcohols and diols was achieved by using an electrogenerated acid-catalyst. A competitive ring-opening reaction of activated epoxides in the presence of deactivated epoxides was also successfully carried out in both alcohols and water.