作者:Tan Ren、You-Cheng Liu、Qing-Xiang Guo
DOI:10.1246/bcsj.69.2935
日期:1996.10
enolizable ketones. Regioselective α- or γ-oxygenated carbonyl compounds were obtained smoothly at ambient temperature in moderate to good yields. Oxyfunctionalization of (+)-carvone and (−)-carvone proceeded stereoselectively, and provided cis-product (5R, 6S)- and (5S, 6R)-2-cyclohexen-1-ones, respectively. Interestingly, unsymmetrical ketones afforded isomeric α- and α′-oxygenated ketones, while allyl
4-甲氧基-2,2,6,6-四甲基-1-氧代哌啶鎓氯化物由相应的 1-哌啶基氧基和氯气制成,用作许多烯醇化酮的氧官能化试剂。区域选择性α-或γ-氧化羰基化合物在环境温度下以中等至良好的产率顺利获得。(+)-carvone 和 (-)-carvone 的氧官能化进行立体选择性,并分别提供顺式产物 (5R, 6S)- 和 (5S, 6R)-2-cyclohexen-1-ones。有趣的是,不对称酮提供异构的 α- 和 α'- 氧化酮,而烯丙基酮通过烯丙基中双键的迁移产生区域特异性的 γ-氧化产物。