An Efficient Process for Synthesis of 2′-<i>O</i>-methyl and 3′-<i>O</i>-methyl Guanosine from 2-aminoadenosine Using Diazomethane and the Catalyst Stannous Chloride
作者:Anilkumar R. Kore、Gaurang Parmar、Srinu Reddy
DOI:10.1080/15257770500544529
日期:2006.4.1
improved strategy for the selective synthesis of 2′-O-methyl and 3′-O-methyl guanosine from 2-aminoadenosine is reported by using the catalyst stannous chloride. The regioselectivity of the 2′ and 3′-O-alkylation was achieved by optimizing the addition, timing, and concentration of the catalysts and diazomethane during the methylation reaction. An efficient and selective alkylation at 2′-OH of 2-aminoadenosine
The use of a compound represented by the following general formula (I) or a pharmaceutically acceptable salt thereof
wherein each of R₁, R₂ and R₃ which may be same or different is hydrogen or alkyl; and R and X have the meanings given in the specification, for the preparation of a medicament which is an adenosinedeaminase inhibitor is disclosed. Some of the compounds of formula (I) are novel compounds. They may be used for the making of a medicament which is for the prevention or therapy of ischemic heart diseases, diseases caused by cerebrovascular disorders, renal diseases and allergic diseases and of post-operative complicated diseases involved with activated oxygen which is generated in ischemic areas during the recirculation of blood after operations.