Synthesis of fused bicyclic rings by tandem radical ring expansion/cyclization: Evaluating competing intramolecular reactions
作者:Cunxiao Wang、Xin Gu、Marvin S. Yu、Dennis P. Curran
DOI:10.1016/s0040-4020(98)00467-0
日期:1998.7
and three-carbon “Dowd-Beckwith” ring expansions of cyclopentanones and cyclohexanones are generally successful, but tandem expansion/cyclization reactions can be compromised by competing processes. An evaluation of the competition between ring expansion, 1,5-hydrogen transfer, and 6-exo cyclization provides information on how to design successful tandem expansion cyclization sequences.
环戊酮和环己酮的一碳和三碳“ Dowd-Beckwith”环扩容通常是成功的,但是竞争性工艺可能会损害串联扩容/环化反应。对环膨胀,1,5-氢转移和6- exo环化之间竞争的评估提供了有关如何设计成功的串联膨胀环化序列的信息。