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When aldehyde s are employed , the Van Leusen reaction is particularly useful to form oxazole s and imidazole s. Mechanism The reaction mechanism consists in the initial deprotonation of TosMIC , which has a very acidic proton stabilized by both the sulfone and nitrile groups .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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