Regiocontrol in Alkylation of Lithium Dienediolates of Unsaturated Carboxylic Acids
作者:Eva M. Brun、Salvador Gil、Margarita Parra
DOI:10.1055/s-2001-9721
日期:——
Alkylation of dienediolates from unsaturated carboxylic acids with benzylic halides often results in mixtures of regioisomers. However it can be controlled by adequate modification of the reaction conditions. Thus, addition of DMI leads mainly to the α-regioisomer, whereas addition of 12-crown-4 allows to obtain the γ-regioisomer as the major product from the same reactants.
用苄基卤化物对来自不饱和羧酸的二烯二醇盐进行烷基化,通常会导致区域异构体混合物的产生。然而,这可以通过对反应条件的适当改良来控制。因此,加入DMI主要导致α-区域异构体的生成,而加入12-冠-4则允许从相同反应物中获得作为主要产物的γ-区域异构体。