Radical cyclization in heterocycle synthesis. Part 13: Sulfanyl radical addition–cyclization of oxime ethers and hydrazones connected with alkenes for synthesis of cyclic β-amino acids
作者:Okiko Miyata、Kanami Muroya、Tomoko Kobayashi、Rina Yamanaka、Seiko Kajisa、Junko Koide、Takeaki Naito
DOI:10.1016/s0040-4020(02)00412-x
日期:2002.5
combination of sulfanyl radical addition–cyclization of the oxime ethers and hydrazones connected with alkenes and subsequent conversion of a phenylsulfanylmethyl group to a carboxyl group provides a novel method for the construction of the cyclic β-amino acids. Upon treatment with thiophenol in the presence of AIBN, the oxime ethers and hydrazones smoothly underwent sulfanyl radical addition-cyclization
硫醚基自由基加成-肟醚和与烯烃连接的的环化反应以及随后苯硫烷基甲基到羧基的转化提供了一种构造环状β-氨基酸的新方法。在AIBN存在下用苯硫酚处理后,使肟醚和平稳地进行硫烷基自由基加成-环化反应,得到2-(苯基硫烷基甲基)环烷基胺。该方法已成功应用于2-氨基环戊烷羧酸和4-氨基-3-吡咯烷羧酸的实际合成。