the pineapple mealybug, was synthesized in four different ways. Ireland–Claisen rearrangement or conjugate addition was employed for the construction of the quaternary carbon center, while ring-closing olefin metathesis or cationic cyclization was used for the construction of the five-membered carbocycle.
凤梨粉的雌性性信息素的外消旋物(±)-(抗-1,2-二甲基-3-亚甲基环戊基)
乙醛是以四种不同的方式合成的。爱尔兰-克莱森重排或共轭加成用于构建季碳中心,而闭环烯烃复分解或阳离子环化则用于构建五元碳环。