Epoxides can be cleaved in a regio- and stereoselective manner under neutral conditions with alcohols and acetic acid in the presence of catalytic amounts of decatungstocerate(IV) ion, ([CeW10O36]8−), affording the corresponding β-alkoxy and β-acetoxy alcohols in high yields. In water, ringopening of epoxides occurs with this catalyst to produce the corresponding diols in good yields.
可以在中性条件下用醇和乙酸在催化量的decatungstocerate(IV)离子([CeW 10 O 36 ] 8-)存在下,以区域和立体选择性的方式裂解环氧化合物,得到相应的β-烷氧基和β-乙酰氧基醇收率高。在水中,该催化剂会发生环氧化物的开环反应,从而以高收率生产出相应的二醇。
Bismuth(III) Chloride (BiCl<sub>3</sub>); An Efficient Catalyst for Mild, Regio- and Stereoselective Cleavage of Epoxides with Alcohols, Acetic Acid and Water
Abstract Epoxides can be cleaved in a regio- and stereoselective manner with alcohols, acetic acid and water in the presence of catalytic amounts of bismuth(III) chloride, affording the corresponding β-alkoxy and β-acetoxy alcohols and diols in high yields.
The preparation of some miscellaneous types formally related to mephenesin is reported.
摘要
报道了一些与美芬甙形式上相关的杂类的制备。
Glycidyl alkoxysilane reactivities towards simple nucleophiles in organic media for improved molecular structure definition in hybrid materials
作者:X. Guillory、A. Tessier、G.-O. Gratien、P. Weiss、S. Colliec-Jouault、D. Dubreuil、J. Lebreton、J. Le Bideau
DOI:10.1039/c6ra01658h
日期:——
For hybridmaterials, the relationship between the macroscopic properties and the molecular structures and dynamics at the microscopic between the organic and inorganic components level is crucial. The characterization of these components as well as their reactivity have to be emphasized in order to design and synthesize improved hybrids. We report herein the first comprehensive study of the reactivity
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.