Etude de l'equilibre conformationnel du phenyl-1 trimethyl-3,3, t-5 cyclohexan et du phenyl-1 trimethyl-1,3,3 cyclohex par RMN de 13 C a base temperature; 评价 de l'interaction diaxial-1,3 du phenyl et dumethyl
Improved addition of organolithium reagents to hindered and/or enolisable ketones
作者:Vincent Lecomte、Elie Stéphan、Franck Le Bideau、Gérard Jaouen
DOI:10.1016/s0040-4020(03)00189-3
日期:2003.3
the addition of some aryl- and alkyllithium derivatives to somehindered and/or enolisable ketones in different solvents (polar and apolar) and, in some cases, at different temperatures and reaction times, will be presented here. The reversibility of the addition of aryllithium to these specific ketones will be observed and discussed. This approach is then used to prepare new steroids as precursor for