Unusual methylation reaction of gem-bromofluorospiropentanes with methyllithium
作者:Elena B. Averina、Kseniya N. Sedenkova、Ilya S. Borisov、Yuri K. Grishin、Tamara S. Kuznetsova、Nikolai S. Zefirov
DOI:10.1016/j.tet.2009.05.032
日期:2009.7
A series of novel gem-bromofluorospiropentanes were synthesized and investigated in the reaction with methyllithium. Either substitution of the fluorine atom for a methyl group or rearrangement into methylated cyclobutene derivatives occurred under these conditions.
Cationic Carbenoid Rearrangement of 2-Phenyl Substituted gem-Dihalogenospiropentanes
作者:Kseniya N. Sedenkova、Elena B. Averina、Yuri K. Grishin、Victor B. Rybakov、Tamara S. Kuznetzova、Nikolay S. Zefirov
DOI:10.1002/ejoc.201000427
日期:2010.7
The series of 2-phenyl- and 2,2-diphenyl gem-dihalogeno-spiropentanes were employed as model compounds to study the carbenoid rearrangement with the use of methyllithium. The scope and limitations of this skeletal rearrangement are outlined and its mechanism is discussed.