Pyrrolidinone-fused Cyclohexenones by Regioselective Dearomatising Anionic Cyclisation of 2-, 3- or 4-Methoxybenzamides
作者:Jonathan Clayden、Kirill Tchabanenko、Samreen A. Yasin、Michael D. Turnbull
DOI:10.1055/s-2001-10772
日期:——
4-MeOC6H4), cyclized with dearomatization to give Me dienyl ethers, e.g. II, which were hydrolyzed with dil. HCl to give single stereo- and regioisomers of pyrrolidine-fused cyclohexenones, e.g. III. The bicyclic enones are versatile synthetic intermediates which undergo transformations such as stereoselective redn. and conjugate addn., regioselective Baeyer-Villiger oxidn., bromination and hydrogenation
在 HMPA 存在下用 t-BuLi 处理后,甲氧基苯甲酰胺,例如 I(Ar = Ph,4-MeOC6H4),通过脱芳构化环化得到 Me 二烯基醚,例如 II,然后用 dil 水解。HCl 得到吡咯烷稠合环己烯酮的单一立体异构体和区域异构体,例如 III。双环烯酮是通用的合成中间体,可进行立体选择性 redn 等转化。和共轭加成,区域选择性 Baeyer-Villiger 氧化、溴化和氢化。[在 SciFinder (R) 上]