文献类型：期刊文献

英文题名：Ring-expansion of MCPs in the presence of DIAD or DEAD and Lewis acids

作者：Shao, LX; Shi, M

机构：[1]E China Univ Sci & Technol, Sch Chem & Pharmaceut, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organomet Chem, Shanghai 200032, Peoples R China

年份：2004

卷号：2004

期号：2

起止页码：426

外文期刊名：EUROPEAN JOURNAL OF ORGANIC CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000188531600020)，CCR-EXPANDED(收录号:WOS:000188531600020)】；

语种：英文

外文关键词：diethyl azodicarboxylate (DEAD); diisopropyl azodicarboxylate (DIAD); Lewis acids; ring expansion

摘要：Treatment of methylenecyclopropanes (MCPs) with DIAD or DEAD in MeCN under mild conditions in the presence of Lewis acid Zr(OTf)(4) gave the cyclobutanone ring-expansion products in good to high yields based on the employed DIAD or DEAD. From a deuterium labeling experiment, the oxygen atom is derived from ambient water. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004).