洋红霉素酮 、 Acetic acid (2S,3R,4S)-6-acetoxy-2,4-dimethyl-4-(2,2,2-trifluoro-acetylamino)-tetrahydro-pyran-3-yl ester 在
4 A molecular sieve
三氟甲磺酸三甲基硅酯 作用下,
以
1,4-二氧六环 、
二氯甲烷 为溶剂,
反应 0.25h,
以70%的产率得到Acetic acid (2S,3R,4S,6R)-6-((1S,3S)-3-acetyl-3,5,10,12-tetrahydroxy-6,11-dioxo-1,2,3,4,6,11-hexahydro-naphthacen-1-yloxy)-2,4-dimethyl-4-(2,2,2-trifluoro-acetylamino)-tetrahydro-pyran-3-yl ester