Unusual iodine catalyzed lactonization of γ-methyl-γ,δ-pentenoic acids: A facile synthesis of γ,γ-dimethyl-γ-butyrolactones
作者:Kyoung Mahn Kim、Eung K. Ryu
DOI:10.1016/0040-4039(96)00026-3
日期:1996.2
γ,γ-Dimethyl-γ-butyrolactones were exclusively obtained from γ-methyl-γ,δ-pentenoicacids with a catalytic amount of iodine in good yields in methylene chloride.
γ,γ-二甲基-γ-丁内酯仅从γ-甲基-γ,δ-戊烯酸中以催化量的碘在二氯甲烷中以高收率获得。
Study on the total synthesis of velbanamine: Chemoselective dioxygenation of alkenes with PIFA via a stop-and-flow strategy
作者:Huili Liu、Kuan Zheng、Xiang Lu、Xiaoxia Wang、Ran Hong
DOI:10.3762/bjoc.9.113
日期:——
5-hydroxymethyl-gamma-lactones were constructed after hydrolysis. This strategy also differentiates terminally substituted alkenes and constitutes a potentially novel synthetic approach for the efficient synthesis toward velbanamine.