Variations in Site of Lithiation of N-[2-(4-Methoxyphenyl)ethyl]pivalamide – Use in Ring Substitution
作者:Keith Smith、Gamal El-Hiti、Mohammed Alshammari
DOI:10.1055/s-0032-1317859
日期:——
Lithiation of N-[2-(4-methoxyphenyl)ethyl]pivalamide at -20 to 0 degrees C with three equivalents of n-BuLi in anhydrous THF, followed by reactions with various electrophiles, gives high yields of products involving ring substitution ortho to the pivaloylaminoethyl group, which was unexpected in view of earlier results reported with t-BuLi.