KATRITZKY A. R.; RAMER W. H.; LAM J. N., J. CHEM. SOC. PERKIN TRANS.,(1987) N 4, 775-780
作者:KATRITZKY A. R.、 RAMER W. H.、 LAM J. N.
DOI:——
日期:——
The lithiation of 1-(phenylthiomethyl)benzimidazole and related compounds
作者:Alan R. Katritzky、Wolfgang H. Ramer、Jamshed N. Lam
DOI:10.1039/p19870000775
日期:——
1-(Phenylthiomethyl)benzimidazole is lithiated initially at the 2-position and at low temperatures the 2-lithio derivative reacts with active electrophiles to form 2-substituted products. At higher temperatures rearrangement occurs to a rather unstable methylene-lithiated isomer, which can be trapped by weaker electrophiles. Lithiation can be directed exclusively to the methylene group by: (a) using