作者:Gordon W. Gribble、Mark G. Saulnier
DOI:10.1016/s0040-4039(00)93671-2
日期:1980.1
Regioselective ortho lithiation of 2-, 3-, and 4-halopyridines is achieved with lithium diisopropylamide (−78°, tetrahydrofuran) to afford, upon quenching with electrophilic reagents, 2,3- and 3,4-disubstituted pyridines in good to excellent yield.
用二异丙基氨基锂(-78°,四氢呋喃)对2-,3-和4-卤代吡啶进行区域选择性邻位锂化,在用亲电试剂淬灭后可得到良好或优异的2,3-和3,4-二取代吡啶屈服。