中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
苯甲酰胞苷 | N4-benzoylcytidine | 13089-48-0 | C16H17N3O6 | 347.327 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
N-苯甲酰基-5'-O-[二(4-甲氧基苯基)苯基甲基]-2'-O-甲基胞苷 | N4-benzoyl-5'-O-(4,4'-dimethoxytrityl)-2'-O-methylcytidine | 110764-74-4 | C38H37N3O8 | 663.727 |
—— | N-[1-[(2R,3R,4S,5R)-5-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-3-hydroxy-4-triethylsilyloxyoxolan-2-yl]-2-oxopyrimidin-4-yl]benzamide | 1453190-11-8 | C43H49N3O8Si | 763.963 |
N-苯甲酰-5'-O-[二(4-甲氧基苯基)苯甲基]-2'-O-[(1,1-二甲基乙基)二甲基硅]-胞苷 | N4-benzoyl-5'-O-(4,4'-dimethoxytrityl)-2'-O-(tert-butyldimethylsilyl)cytidine | 81256-87-3 | C43H49N3O8Si | 763.963 |
—— | N,2',3'-O-tribenzoylcytidine | 54898-05-4 | C30H25N3O8 | 555.544 |
A modified phosphotriester method has been successfully applied for the chemical synthesis of ribooligonucleotides. The starting material is a fully protected ribomononucleoside containing a 3′-phosphotriester group 5. The coupling reaction is performed using mesitylenesulfonyl tetrazole and purification of the product achieved using reversed phase column chromatography. The effectiveness of this method has been demonstrated by achieving an efficient and rapid synthesis of r-A7, r-A11, r5′-AAACAUGAGGA-3′, and r5′-UUACCCAUGU-3′ (R-17, translation control sequence).
Procedures have been developed for the selective formation of (a) 2′,5′-silylated ribonucleosides and (b) 3′,5′-silylated ribonucleosides. These procedures also permit the selective silylation at either the 2′- or 3′-position of dimethoxytritylated ribonucleosides. The procedures involve nitrate or perchlorate ion catalysis for selective reaction at 2′-positions and a combination of silver ion and DABCO or 4-nitropyridine N-oxide for selective reaction at the 3′-position. During the course of this work a general and rapid procedure was developed for the preparation and isolation of the 5′-dimethoxytrityl derivatives of the four common ribonucleosides. Silver ion was found to have a marked effect on dimethoxytritylation reactions.