A three step efficient strategy for the synthesis of substituted5-nitropiperidones in high de, employing Michael additionof N-
p-tolylsulfinyl
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-nitroamines to
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,
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-unsaturated esters,hydrolysis of the sulfinyl group, and cyclization of theresulting free amines, has been developed. A very simpleexperimental procedure involving mild conditions and onlyone chromatographic purification are the main features ofthe process.