关键词: 不饱和酯, 加成反应, 红外分光光度法, 双环化合物, 铜催化剂, 环化, 元素分析, 酮, 核磁共振谱法, 氮杂环化合物

Seven optically active 3-oxabicyclo-[3.1.0]-hex-2-one derivatives (or bicyclic lactones) were prepared from unsaturated esters of diazoacetic acid by the asymmetric intramolecular carbon addition under the action of a chiral copper catalyst, (S)-7644. The merit of this method is its simple operation using commercially available reagents. The structure of the products obtained were confirmed by elemental analysis, IR, NMR and the specific rotation, the e. e. values were also determined.

Key words: UNSATURATED ESTERS, ELEMENTAL ANALYSIS, ADDITION REACTION, BICYCLIC COMPOUND, CYCLIZATION, KETONE, NMR SPECTROMETRY, NITROGEN HETEROCYCLICS, INFRARED SPECTROPHOTOMETRY