cycloisomerisation reaction of 1,6-enyne acetic esters have been developed. This cyclization reaction shows excellent regioselectivity and good functional group tolerance to obtain five-membered nitrogenated heterocyclic conjugated trienes in moderate to excellent yields. The resulting conjugated trienes could be facilely converted to highly substituted benzenes through Diels-Alder reactions.
已经开发了
钯催化的1,6-烯炔
乙酸酯的环异构化反应。该环化反应显示出优异的区域选择性和良好的官能团耐受性,以中等至优异的产率获得了五元氮化杂环共轭
三烯。所得的共轭
三烯可通过狄尔斯-阿尔德反应容易地转化为高度取代的苯。