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。
A highly efficient protocol for regioselective ring-opening of epoxides with alcohols, water, acetic acid, and acetic anhydride catalyzed by SbF<sub>3</sub>
作者:Behzad Zeynizadeh、Masumeh Gilanizadeh、Farkhondeh Mohammad Aminzadeh
DOI:10.1080/10426507.2015.1135439
日期:2016.7.2
the corresponding β-alkoxy, β-acetoxy alcohols, and 1,2-diols in high to excellent yields. This study also represents a convenient synthesis of vic-diacetates from ring-opening of epoxides with aceticanhydride.
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.
Green solvents from glycerol. Synthesis and physico-chemical properties of alkyl glycerol ethers
作者:José I. García、Héctor García-Marín、José A. Mayoral、Pascual Pérez
DOI:10.1039/b923631g
日期:——
A family of glycerol derivatives, consisting of over sixty 1,3-dialkoxy-2-propanols and 1,2,3-trialkoxypropanes, both symmetrically and unsymmetrically substituted at terminal positions, have been synthesized and the possible role of these glycerol derivatives as substitutive solvents has been evaluated through measurements of their physico-chemical properties. The molecular diversity of the derivatives
Compounds having a structure of Formula I: wherein G, a, Q, L
2
, R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are as defined herein are provided. Uses of such compounds for treatment of various indications, including prostate cancer as well as methods of treatment involving such compounds are also provided.