[reaction: see text] 2,4,5-Triaryl-imidazoles were synthesized directly from the keto-oxime in moderate to good yields via cyclization to the N-hydroxyimidazole and an unprecedented in situ thermal reduction of the N-O bond upon microwave irradiation at 200 degrees C for 20 min.
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Sparks et al. (2004) studied this question.
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