Starting from the photocycloaddition of methyl 2,4-dioxopentanoate with 4-isopropenyltoluene, isolaurene was synthesized, and its further conversion to 5-cuparenone constituted the formal synthesis of cuparene. For the first time, the proto-(2+2)π cycloadduct, a β-keto cyclobutanol derivative, has been isolated from the product mixture.
从 2,4-dioxopentanoate 甲酯与 4-isopropenyltoluene 的光环加成开始,合成了异
脲醛,并进一步将其转化为 5-cuparenone,正式合成了
铜烯烃。首次从产品混合物中分离出了原-(2+2)π 环加载产物,即一种 β-酮
环丁醇衍
生物。