作者: Zhou Bingcheng , Qiu Weiqiang , Guo Binbin , Qiao Zhitao , Sun Bo
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摘要: The invention discloses a method for preparing everolimus intermediate and ethylated impurities thereof, particularly relates to synthetizin an immuno-suppressor thereof. is synthesized by substituting so as obtain target compound. simple in preparation process high yield, does not need column chromatography, suitable industrial application. An efficient synthesis of provided the first time. structural formula shown specification.