A Cheap Amino Alcohol Catalyzed One-Pot, Tri-Component Synthesis of Tetrahydrochromene Derivatives. -threo-2-Amino-1-(p-nitrophenyl)-1,3-propanediol, a "chiral waste" in the production of chloromycetin, efficiently catalyzes the three-component Hantzsch-type reaction of dimedone, aldehydes and malononitriles furnishing tetrahydrochromenone derivatives (IV) (19 examples) in good to excellent yields. -(SONG, S.; SHAN*, Z.; JIN, Y.; Lett.
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