(+)-14-Acetoxy-4-demethoxydaunomicinone 、
4-O-[4-O-(3-N-allyloxycarbonyl-3-amino-2,3,6-trideoxy-4-O-p-nitrobenzoyl-α-L-lyxo-hexopyranosyl)-3-O-allyloxycarbonyl-2,6-dideoxy-α-L-lyxo-hexopyranosyl]-3-O-allyloxycarbonyl-2,6-dideoxy-1-O-p-nitrobenzoyl-α-L-lyxo-hexopyranoside 在
三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下,
以
乙醚 、
二氯甲烷 为溶剂,
反应 1.5h,
以60%的产率得到7-{3-O-allyloxycarbonyl-4-O-[3-O-allyloxycarbonyl-2,6-dideoxy-4-O-(3-N-allyloxycarbonyl-3-amino-2,3,6-trideoxy-4-O-p-nitrobenzoyl-α-L-lyxo-hexopyranosyl)-α-L-lyxo-hexopyranosyl]-2,6-dideoxy-α-L-lyxo-hexopyranosyl}-14-acetoxy-4-demethoxyadriamycinone