吡啶 、
phosphorochloridothioic acid,O,S-dimethyl ester 、
5'-O-(4-monomethoxytrityl)-2'-deoxythymidine 以
苯 为溶剂,
以92%的产率得到Thiophosphoric acid O-[(2R,3S,5R)-2-[(4-methoxy-phenyl)-diphenyl-methoxymethyl]-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-yl] ester S-methyl ester; compound with pyridine