The present invention is directed to a method for continuous production of dihydroartemisinin and also artemisinin derivatives derived from dihydroartemisinin by using artemisinin or dihydroartemisinic acid (DHAA) as starting material as well as to a continuous flow reactor for producing dihydroartemisinin as well as the artemisinin derivatives. It was found that the reduction of artemisinin to dihydroartemisinin in a continuous process requires a special kind of reactor and a special combination of reagents comprising a hydride reducing agent, at least one activator such as an inorganic activator, at least one solid base, at least one aprotic solvent and at least one C1-C5 alcohol.
本发明涉及一种连续生产二
氢青蒿素以及由二
氢青蒿素衍生的
青蒿素衍
生物的方法,该方法利用
青蒿素或
二氢青蒿酸(
DHAA)作为起始物质,并且涉及一种用于生产二
氢青蒿素以及
青蒿素衍
生物的连续流反应器。发现在连续过程中将
青蒿素还原为二
氢青蒿素需要一种特殊类型的反应器和一种特殊的试剂组合,包括一种
氢化物还原剂,至少一种活化剂(例如无机活化剂),至少一种固体碱,至少一种无极性溶剂以及至少一种C1-C5醇。