Application of [Hydroxy(tosyloxy)iodo]benzene in the Wittig-Ring Expansion Sequence for the Synthesis of β-Benzocyclo-alkenones from α-Benzocycloalkenones
作者:M. Justik、G. Koser
DOI:10.3390/10010217
日期:——
beta-benzocyclo-alkenones containing six, seven and eight-membered rings is reported. This was accomplished via a Wittig olefination-oxidative rearrangement sequence using[hydroxy(tosyloxy)iodo]-benzene (HTIB) is the oxidant, that enables the synthesis of regioisomeric pairs of methyl-substituted beta-benzocycloalkenones. The incorporation of carbon-13 at C-1 of the beta-tetralone nucleus was also demonstrated. The
报道了α-苯并环烯酮向含有六、七和八元环的同源β-苯并环烯酮的转化。这是通过 Wittig 烯化-氧化重排序列实现的,使用 [羟基(甲苯磺酰氧基)碘]-苯 (HTIB) 作为氧化剂,能够合成甲基取代的 β-苯并环烯酮的区域异构对。还证明了在 β-四氢萘酮核的 C-1 处掺入了碳 13。Wittig-HTIB 方法是类似序列的有用替代方法,其中在氧化步骤中使用 Tl(NO3)3.3H2O 或 Prevost 组合 (AgNO3/I2)。