1354647-68-9Relevant articles and documents
New synthesis of 2-benzimidazoleacetates and study of their Knoevenagel reaction
Yang, Peng Hui,Zhang, Qun Zheng,Yu, Hong Jiang
, p. 1403 - 1409 (2012/11/07)
To obtain 2-benzimidazolyl acrylate 2, a new efficient synthesis of 2-benzimidazoleacetate, involving esterification of 2-benzimidazole acetic acid at low temperature as the crucial step, was developed. The generality and efficiency of the process was illustrated by the high-yield synthesis of methyl, ethyl, i-propyl, and n-butyl 2-benzimidazoleacetate. The Knoevenagel reaction of 2-benzimidazoleacetate with aromatic aldehydes was studied. It was found that only in the presence of a catalytic amount of morpholine could the Knoevenagel reaction proceed to give the expected 3-aryl-2-benzimidazolyl acrylate. A mechanism for the morpholinecatalyzed reaction is suggested. Springer Science+Business Media B.V. 2011.