substituents fetched products
232
in good to high yields. The
scope of the reaction was extended to the synthesis of tetra-
substituted imidazoles
233
in the presence of LADES@MNP.
Even aromatic aldehydes bearing hydroxyl, nitro and
carboxylic acid substituents were tolerated
Scheme 101. Synthesis of 1,2,4,5-tetrasubstituted imidazoles
(Scheme 101). The mechanism for the formation of imidazole
is depicted in scheme 102. Ammonia mediated addition to
aldehyde
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