Chemoselective Lithiation of 1-Bromo-n-chloroalkanes
作者:Francisco Foubelo、Abdeslam Abou、Miguel Yus
DOI:10.1002/ejoc.200500407
日期:2005.12
between different 1-bromo-n-chloroalkanes (1–3), lithium/naphthalene (1:2 molar ratio) and a carbonyl compound R1R2CO in THF at –78 °C provide, after hydrolysis with water, the corresponding chlorinated alcohols 4 through selective lithiation of the carbon–bromine bond. When an excess of lithium (1:7 molar ratio) is added to the reaction mixture before the hydrolysis, lithiation of the remaining carbon–chlorine