{N-acetyl S-[N4-(benzyloxycarbonyl)-1-(ω-carbonylmethyl)cytosine-6-methyl]-L-cysteine ester}-{S-[N4-(benzyloxycarbonyl)-1-(ω-carbonylmethyl)cytosine-6-methyl]-L-cysteine methyl ester}-{S-[1-(ω-carbonylmethyl)uracil-6-methyl]-L-cysteine methyl ester}-S-{1-[(tert-butoxy)carbonylmethyl]uracil-6-methyl}-L-cysteine methyl ester 在
三乙基硅烷 、
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
以98%的产率得到{N-acetyl S-[N4-(benzyloxycarbonyl)-1-(ω-carbonylmethyl)cytosine-6-methyl]-L-cysteine ester}-{S-[N4-(benzyloxycarbonyl)-1-(ω-carbonylmethyl)cytosine-6-methyl]-L-cysteine methyl ester}-{S-[1-(ω-carbonylmethyl)uracil-6-methyl]-L-cysteine methyl ester}-S-[1-(carboyxmethyl)uracil-6-methyl]-L-cysteine methyl ester