作者:Alfred L. Williams、Teresa Abad Grillo、Daniel L. Comins
DOI:10.1021/jo0163290
日期:2002.3.1
During a study on iodocyclocarbamation reactions of 2-styryl-4-piperidones, a novel ring contraction was observed. Iodocyclocarbamation of 2-styryl-4-piperidone 3 gave the bicyclic carbamate 4. Reduction of 4 under free-radical conditions effected a stereoselective ring contraction to provide oxazolidinone 6. A three-electron-three-center mechanism is proposed.
在对2-苯乙烯基-4-哌啶酮的碘环氨基甲酸酯化反应的研究中,观察到了新的环收缩。2-苯乙烯基-4-哌啶酮3的碘环氨基甲酸酯化得到双环氨基甲酸酯4。在自由基条件下还原4实现了立体选择性环收缩,从而提供了恶唑烷酮6。提出了一种三电子三中心机理。