Selective Oxidation of Alcohols at the Benzylic Position by Benzeneseleninic Anhydride
作者:Naotoshi Toki、Tsuyoshi Satoh
DOI:10.1248/cpb.52.1009
日期:——
Benzeneseleninicanhydride in the presence of tert-butyl hydroperoxide in chlorobenzene at about 70 degrees C is an effective oxidizing agent for the selective oxidation of alcohols at the benzylic position.
A catalytic amount of nickel(II) chloride hexahydrate and 1,2-ethanedithiol is a good combination for the cleavage of tetrahydropyranyl (THP) and tert-butyldimethylsilyl (TBS) ethers
作者:Abu T. Khan、Samimul Islam、Lokman H. Choudhury、Subrata Ghosh
DOI:10.1016/j.tetlet.2004.11.011
日期:2004.12
Various THP and TBS ethers can be unmasked easily to the corresponding hydroxyl compounds in good yields by using a combination of a catalytic amount of nickel(II) chloride hexahydrate and 1,2-ethanedithiol at room temperature. In addition, alkyl TBS ethers can be hydrolyzed chemo selectively in the presence of aryl TBS ethers. Moreover, alkyl TBS ethers can be cleaved easily in the presence of alkyl or aryl THP ethers using the same conditions. (C) 2004 Published by Elsevier Ltd.