The irradiation of 1-(dehydroabietoyl) imidazole (3) gave no Type II elimination product but yielded instead compounds 6 and 7 by migration of the imidazolylcarbonyl group from C(4′) to C(6′) of the abietan moiety, probably via a cyclobutanol intermediate. Similarly, irradiation of 1-(13′-deisopropyl-10′-epi-dehydro-abietoyl)imidazole (13) gave only a small amount of Type II fragmentation product 20
1-(脱氢癸二酰基)
咪唑(3)的辐照没有产生II型消除产物,而是通过将
咪唑基羰基从abietan部分的C(4')迁移到C(6')产生了化合物6和7。
环丁醇中间体。类似地,辐照1-(13'-去异丙基-10'-表-脱氢-abietoyl)
咪唑(13)仅产生少量的II型裂解产物20,衍生自γ-氢的主要产物是
环丁醇衍
生物16和17。