Synthesis of Dibenzocyclohepten-5-ones by Electrophilic Iodocyclization of 1-([1,1′-Biphenyl]-2-yl)alkynones
作者:Yu Chen、Chenlong Huang、Xiaochen Liu、Eliyahu Perl、Zhiwei Chen、Jieun Namgung、Gopal Subramaniam、Gan Zhang、William H. Hersh
DOI:10.1021/jo5001803
日期:2014.4.18
iodine)-induced intramolecular 7-endo-dig cyclization of 1-([1,1′-biphenyl]-2-yl)alkynones is reported. Detailed investigations on the substituent effects during the electrophilic iodocyclization of the alkynones show that they play a crucial role in determining the reaction pathways of the cyclization. By modifying the substitution pattern on the alkynone substrates, the cyclization takes place regioselectively
报道了由一氯化碘(或碘)诱导的1-([[1,1'-联苯] -2-基)炔烃的分子内7-内位-环化反应合成的碘取代的二苯并环庚基-5-酮。对炔类化合物进行亲电碘代环化过程中取代基作用的详细研究表明,它们在决定环化反应途径中起着至关重要的作用。通过修饰炔基底物上的取代模式,环化发生区域选择性,通过7-endo-dig环化反应生成二苯并环庚基5-酮,或通过6-endo-dig环化反应生成螺共轭化合物。