Synthetic Photochemistry. XXVIII. A Photochemical C<sub>5</sub>-Homologation of 4-Isopropenyltoluene with Methyl 2,4-Dioxopentanoate to Isolaurene and a Formal Synthesis of Cuparene
作者:Hitoshi Takeshita、Akira Mori、Satoshi Nakamura
DOI:10.1246/bcsj.57.3152
日期:1984.11
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。