摘要/Abstract
在六氟锑酸/乙醇的体系中，80℃条件下，2-重氮-3，5-二氧代-6-炔酯/炔酮/炔酰胺环化生成重氮γ-吡喃酮衍生物；然而，在乙酸/三乙胺/1，2-二氯乙烷体系中，25℃条件下，其环化反应主要生成重氮3（2H）-呋喃酮.在Rh（Ⅱ）催化下，这些重氮化合物与烯烃可以进行有效的分子间环丙烷化.
关键词: 重氮g-吡喃酮, 重氮3(2H)-呋喃酮, 合成, 环丙烷化, 区域选择性
For HSbF6/EtOH system, diazo γ-pyrones were cleanly obtained starting from 2-diazo-3,5-dioxo-6-ynoates/ynones/ynamide at 80℃, whereas diazo 3(2H)-furanones were predominantly generated in HOAc-Et3N-1,2-dichloroethane system at 25℃. These diazo compounds can undergo an efficient Rh(Ⅱ)-catalyzed intermolecular cyclopropanation with alkene.
Key words: diazo γ-pyrone, diazo 3(2H)-furanone, synthesis, cyclopropanation, regioselectivity
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