Lithium Hexamethyldisilazane Transformation of Transiently Protected 4-Aza/Benzimidazole Nitriles to Amidines and their Dimethyl Sulfoxide Mediated Imidazole Ring Formation
作者:Reham A. I. Abou-Elkhair、Abdalla E. A. Hassan、David W. Boykin、W. David Wilson
DOI:10.1021/acs.orglett.6b02359
日期:2016.9.16
from nitriles in 58–88% yields. This strategy offers a much better choice to prepare BI/azaBI amidines than the lengthy, low-yielding Pinner reaction. Synthesis of aza/benzimidazole rings from aromatic diamines and aldehydes was affected in dimethylsulfoxide in 10–15 min, while known procedures require long time and purification. These methods are important for the BI/azaBI-based drug industry and