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The preparation of heterocycles containing phosphorus has been the subject of numerous papers inCommunications to the Editor

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Reduction of 3-oxypyridyl betaines la and lb with rhodium-on-carbon affords the corresponding N-substituted-3-hydroxypiperidine compounds Ila and lib. The 3-hydroxypiperidines, their 3-oxy derivatives and quaternaries of these structures were examined for pharmacological activity. Significant central nervous system depression, and anti-inflammatory and curare-like activity were found with selected structures.

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