9-((tert-butyldimethylsilyloxy)methyl)-1,4-dioxaspiro[4.5]dec-6-en-8-one 、
丙二酸二甲酯 在
哌啶 、
(S)-5-(吡咯烷-2-基)-1H-四唑 作用下,
以
氯仿 为溶剂,
反应 120.0h,
生成 trans-dimethyl 2-(9-((tert-butyldimethylsilyloxy)methyl)-8-oxo-1,4-dioxaspiro[4.5]decan-6-yl)malonate 、 trans-dimethyl 2-(9-((tert-butyldimethylsilyloxy)methyl)-8-oxo-1,4-dioxaspiro[4.5]decan-6-yl)malonate 、 trans-dimethyl 2-(9-((tert-butyldimethylsilyloxy)methyl)-8-oxo-1,4-dioxaspiro[4.5]decan-6-yl)malonate