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 R2—N—O—R1 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工艺,用于在温和条件下制备
HMG-CoA还原酶
抑制剂,如罗伊司他
钙、
氟伐他汀
钠和
匹伐他汀钙,使用一种具有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,本发明还提供了一种新型化合物,用于其制备的中间体以及其制备方法。