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Very poor conversion was observed when using optimized reaction conditions.
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Notably, a small amount of pyrazole product was observed by using MeCN as the solvent, see
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As an example of the value of this method, we quote the cost of purchasing the starting materials and the product in 99 % purity from Sigma-Aldrich for one transformation: aniline: 25.70 Euro per L; ethyl acetoacetate: 38 Euro per 1 kg; ethyl-2-methylindole-3-carboxylate: 67.20 Euro per g
-
As an example of the value of this method, we quote the cost of purchasing the starting materials and the product in 99 % purity from Sigma-Aldrich for one transformation: aniline: 25.70 Euro per L; ethyl acetoacetate: 38 Euro per 1 kg; ethyl-2-methylindole-3-carboxylate: 67.20 Euro per g.
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