The paper reported the new technology of preparing betaine through two steps,which contain the neutralization reaction of KOH and ClCH2COOH,amination reaction of(CH3)3N and ClCH2COOK,then the betaine is obtained by se...The paper reported the new technology of preparing betaine through two steps,which contain the neutralization reaction of KOH and ClCH2COOH,amination reaction of(CH3)3N and ClCH2COOK,then the betaine is obtained by separation and purification.This method removes chloride ion conveniently and effectively and gain betaine with high purity,thus having a potential applying future.展开更多
Two new norditerpenoid alkaloids were isolated from the roots of Aconitum nagarum.Their structures were elucidated as 13-hydroxyfranchetine 1 and 10-dehydroxyflavaconitine 2,respectively, by 1D and 2D NMR experiments.
文摘The paper reported the new technology of preparing betaine through two steps,which contain the neutralization reaction of KOH and ClCH2COOH,amination reaction of(CH3)3N and ClCH2COOK,then the betaine is obtained by separation and purification.This method removes chloride ion conveniently and effectively and gain betaine with high purity,thus having a potential applying future.
文摘Two new norditerpenoid alkaloids were isolated from the roots of Aconitum nagarum.Their structures were elucidated as 13-hydroxyfranchetine 1 and 10-dehydroxyflavaconitine 2,respectively, by 1D and 2D NMR experiments.
