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。
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.
The nucleophilic ringopening reactions of epoxides by aliphatic alcohols and water are achieved efficiently in the presence of catalytic amounts of silica sulfuric acid with high degree of regioselectivity. The catalyst is reusable and can be applied several times without any decrease in the yield of reactions.
Mild and Efficient Ring Opening of Epoxides Catalyzed by Potassium Dodecatungstocobaltate(III)
作者:Shahram Tangestaninejad、Majid Moghadam、Valiollah Mirkhani、Bahram Yadollahi、S. Mohammad R. Mirmohammadi
DOI:10.1007/s00706-005-0415-7
日期:2006.2
Efficientring opening of epoxides under mild conditions is reported. Potassium dodecatungstocobaltate(III) trihydrate was used as an efficient catalyst for the alcoholysis and acetolysis of epoxides. Conversion of epoxides to thiiranes was also performed efficiently in the presence of this catalyst.
Scalable and super-stable exfoliation of graphitic carbon nitride in biomass-derived γ-valerolactone: enhanced catalytic activity for the alcoholysis and cycloaddition of epoxides with CO<sub>2</sub>
作者:Zhimin Xue、Feijie Liu、Jingyun Jiang、Jinfang Wang、Tiancheng Mu
DOI:10.1039/c7gc02583a
日期:——
γ-Valerolactone could exfoliate bulk g-C3N4 to form a super-stable dispersion of few-layer g-C3N4 nanosheets with a high concentration of 0.8 mg mL−1, showing enhanced activity for non-photocatalytic reactions.