Two bridged purine dinucleosides, bis(2-N-acetyl-6-N-alkylylene-2,6-diaminopurine-2',3',5'-triacetyl-beta-D-ribofuranoside), were synthesized fi om the reaction of the key medium 3, 2-acetylamino-6-[1-(1,2...Two bridged purine dinucleosides, bis(2-N-acetyl-6-N-alkylylene-2,6-diaminopurine-2',3',5'-triacetyl-beta-D-ribofuranoside), were synthesized fi om the reaction of the key medium 3, 2-acetylamino-6-[1-(1,2,4-triazolyl)]-purine-2',3',5'-triacetyl-beta-D-ribofuranoside with dialkylamine.展开更多
A series of stable semi-ketals were obtained via the reactions of 3',5'-O-(tetraisopropyldisiloxane-1,3-diyl)-2'-ketouridine 1 with primary alcohols. In the addition reaction,only a single diastereomer was...A series of stable semi-ketals were obtained via the reactions of 3',5'-O-(tetraisopropyldisiloxane-1,3-diyl)-2'-ketouridine 1 with primary alcohols. In the addition reaction,only a single diastereomer was observed. The configuration of 3b was confirmed by X-raydiffraction.展开更多
文摘Two bridged purine dinucleosides, bis(2-N-acetyl-6-N-alkylylene-2,6-diaminopurine-2',3',5'-triacetyl-beta-D-ribofuranoside), were synthesized fi om the reaction of the key medium 3, 2-acetylamino-6-[1-(1,2,4-triazolyl)]-purine-2',3',5'-triacetyl-beta-D-ribofuranoside with dialkylamine.
文摘A series of stable semi-ketals were obtained via the reactions of 3',5'-O-(tetraisopropyldisiloxane-1,3-diyl)-2'-ketouridine 1 with primary alcohols. In the addition reaction,only a single diastereomer was observed. The configuration of 3b was confirmed by X-raydiffraction.
