作者:J. P. Dulcère、V. Agati、R. Faure
DOI:10.1039/c39930000270
日期:——
Cohalogenation of cycloalkenes 1 by N-bromosuccinimide (NBS) in 4-methylpent-4-en-2-yn-1-ol affords β-bromopent-4-en-2-ynyl ethers 2 which undergo facile base-promoted consecutive dehydrohalogenation-isomerization-intramolecular DielsâAlder cycloaddition leading to tricyclic conjugated enol ethers 6.
环烯烃1与N-溴琥珀酰亚胺(NBS)在4-甲基戊-4-烯-2-炔-1-醇中发生共卤化反应,得到β-溴戊-4-烯-2-炔醚2。该化合物通过碱催化促进的连续去卤脱氢-异构化-分子内狄尔斯-阿尔德环加成反应,形成三环共轭烯醇醚6。