<b>Microwave-Assisted Ring Opening of Epoxides with Pyrimidine Nucleobases: A Rapid Entry into</b>
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<i>C</i>
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<b>-Nucleoside Synthesis</b>
作者:A. Khalafi-Nezhad、M. N. Rad、A. Khoshnood
DOI:10.1055/s-2004-815968
日期:——
Microwaveirradiation strongly accelerates the regioselective nucleophilic ring opening of epoxides by pyrimidine nucleobases. In the presence of tetrabutylammonium bromide (TBAB), various bases were elaborated to determine the proper base in which it can activate N 1 rather than N3 for alkylation. It was shown that MgO not only could serve as an eligible base, but also enhanced the selectivity and
Synthesis of 3-O-aryl esters of (R,S)-9-(2,3-dihydoxypropyl)adenine and its pyrimidine analogs as new potential inhibitors ofS-adenosyl-L-homocysteine hydrolase
作者:A. A. Ozerov、M. S. Novikov、A. K. Brel'
DOI:10.1007/bf02251667
日期:1999.1
Silica Sulfuric Acid (SSA) as a Highly Efficient Heterogeneous Catalyst for Persilylation of Purine and Pyrimidine Nucleobases and Other <i>N</i>-Heterocycles Using Hmds
Purine and pyrimidine nucleobases and other N-heterocycles have been silylated with HMDS in excellent yields in the presence of a catalytic amount of silica sulfuric acid (SSA) as a heterogeneous catalyst. SSA utilizes a shorter reaction time and higher yields of silylated nucleobases. SSA is reusable for several times without a decrease in reactivity or yield of silylated adducts.