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In this paper, a simple and environment-friendly protocol was developed for the synthesis of arylsulfonyl 4 H -pyrans  via  L-proline-catalyzed one-pot two-step reaction of aromatic aldehyde with phenylsulphonyl acetonitrile and dimedone under ball-milling conditions. Environmental acceptability, wide substrate scope, low cost and operational simplicity are the key features of this method.

One-pot two-step mechanochemical synthesis of arylsulfonyl 4 H -pyrans