Photochemical reactions of tetrachloro-1,4-benzoquinone (chloranil) with tricyclo[4.1.0.02,7]heptane (Moore's hydrocarbon) and bicyclo[4.1.0]hept-2-ene (2-norcarene)
作者:Manfred Christl、Max Braun、Oliver Deeg
DOI:10.1039/c3ob27305a
日期:——
Solutions of chloranil (CA) in benzene were irradiated in the presence of Moore's hydrocarbon (MH) and 2-norcarene (NC). These reactions brought about four common products, namely 2,3,5,6-tetrachlorohydroquinone (TCH) and three 1 : 1 cycloadducts, whose C7H10 subunits were reorganised in comparison to the skeletons of MH and NC. As the fifth product, a norcar-3-en-2-yl ether of TCH was formed in the
解决方案 氯苯胺(CA)在苯在摩尔碳氢化合物(MH)存在下进行辐照2-降冰片烯(NC)。这些反应带来了四个共同的产物,即2,3,5,6-四氯氢醌(TCH)和三个1:1的环加合物,与MH和NC的骨架相比,其C 7 H 10亚基被重组。作为第五种产物,在NC的情况下形成了TCH的正甲-3-烯-2-基醚,而MH则生成了具有TCH的非对映体双(内-2-正十八烷基)醚的结构的物质。。对照实验表明,该物质也是由MH和TCH产生的,无辐射。鉴于已知将酸加到MH上得到norcaranes取代在位置2和的已知酸催化异构化MH到NC,似乎很明显,TCH是的光反应的唯一真正的产品CA与MH。TCH是一种酸,然后不仅吸收了两当量的MH,提供了所提及的双醚,而且还催化了MH向NC的重排,后者用作激发CA的底物,产生了上述3:1的环加合物。