Trimethylsilylacetylene → HCID 18396487, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 5'-deoxy-2',3'-di-O-acetyl-5-iodocytidine (1.35 g, 3.087 mmol) in CH2Cl2 (15 ml) there was added N,N-diisopropylethylamine (0.537 ml, 3.087 mmol), Cul (58 mg, 0.309 mmol), Pd(PPh3)2Cl2 (60 mg, 0.085 mmol), and trimethylsilyl-acetylene (0.523 ml, 3.704 mmol) at room temperature under Ar. The reaction mixture was then heated to 60° C. After stirring for 2 hours, the mixture was cooled to room temperature. The solvent was removed under reduced pressure, and the residue dissolved in EtOAc (200 ml), washed with 2% aq. EDTA.2Na, water and brine, dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure. The crude product was purified by flash chromatography on SiO2 (f2.2×25 cm, eluent: EtOAc) to give 2',3'-di-O-acetyl-5'-deoxy-5-[2-(trimethylsilyl)ethynyl]cytidine as a pale yellow solid. (1.20 g, 95% y.).

Provenance & Evidence