The present invention provides an improved process for preparing HMG-CoA reductase inhibitors such as rosuvastatin calcium, fluvastatin sodium, and pitavastatin calcium under a mild condition, using a novel amide-bond-containing compound having R
2
—N—O—R
1
moiety as a key intermediate. And also, the present invention provides the novel compound, an intermediate useful for the preparation thereof, and a process for the preparation thereof.
本发明提供了一种改进的方法,用于制备
HMG-CoA还原酶
抑制剂,例如罗伊司他
钙、
氟伐他汀
钠和
匹伐他汀钙,在温和的条件下使用具有R2—N—O—R1基团的新型酰胺键含有化合物作为关键中间体。此外,本发明还提供了该新型化合物、其制备有用的中间体以及制备该化合物的方法。