cyclohexylammonium S,S-diphenyl phosphorodithioate 、
2'-deoxy-5'-O-(4,4'-dimethoxytrityl)-N6-phthaloyladenosine 在
2,4-二磺酰氯基均三甲苯 作用下,
以
吡啶 为溶剂,
以87%的产率得到Dithiophosphoric acid O-{(2R,3S,5R)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-5-[6-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-purin-9-yl]-tetrahydro-furan-3-yl} ester S,S'-diphenyl ester