作者:Kerstin Schmidt、Paul Margaretha
DOI:10.1002/hlca.201100203
日期:2011.11
presence of alkenes (2,3‐dimethylbut‐2‐ene, 1,1‐dimethoxyethene, and 2,4,4‐trimethylpent‐1‐ene), benzoxepinone 1 and dioxepinone 2 are converted into mixtures of cis‐ and trans‐fused oxabicyclo[5.2.0]nonan‐2‐ones. Their relative thermodynamic stabilities (as reflected by the observed diastereoisomer ratios after equilibration with basic alumina) depend on the substitution pattern of the alkene moiety
在烯烃(2,3-二甲基丁-2-烯,1,1-二甲氧基乙烯和2,4,4-三甲基戊-1-烯)存在下进行辐射(350 nm)时,苯并庚酮1和二氧己酮2被转化为顺式和反式氧杂双环[5.2.0] nonan-2-one的混合物。它们的相对热力学稳定性(如在用碱性氧化铝平衡后所观察到的非对映异构体比率所反映)取决于烯烃部分的取代方式。