Regiospecificity in nucleophilic displacement of aromatic nitro-groups
作者:Fabio Benedetti、Donald R. Marshall、Charles J. M. Stiriling
DOI:10.1039/c39820000918
日期:——
Displacement of nitro-groups by thiolate ions from aromatic polynitro-compounds is highly selective for nitro-groups adjacent to alkyl groups except when the thiolate ion is bulky, the alkyl group is bulky, or both.
作者:M.G Cabiddu、S Cabiddu、E Cadoni、R Cannas、S De Montis、C Fattuoni、S Melis
DOI:10.1016/s0022-328x(00)00806-8
日期:2001.2
The metallation reactions of (methylthio)anilines with organolithium reagents and with the butyllithium–potassium tert-butoxide superbasic mixture are here described. The results show that the para isomer when treated with butyllithium gave a mixture of products with no selectivity. Using tert-butyllithium or superbases we obtained the substitution of the thiomethyl hydrogen. Moreover, superbase allowed