Silica-supported 1,3-Dichloro-5,5-dimethylhydantoin (cas 118-52-5) (DCH) as a useful reagent for microwave-assisted aromatization of 1,3,5-trisubstituted pyrazolines under solvent-free conditions
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Add time:08/27/2019 Source:sciencedirect.com
1,3,5-Trisubstituted pyrazolines are rapidly and conveniently oxidized to their corresponding pyrazoles by 1,3-Dichloro-5,5-dimethylhydantoin (cas 118-52-5) (DCH) in solution and solvent-free conditions under microwave irradiation. The presence of silica gel as a supporting agent is shown to be effective in reducing the reaction times and increasing the yields.
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