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Primary or secondary alcohols will reduce enamines to their corresponding saturated amines when heated in a microwave apparatus at a temperature of 160°C for a period of one hour.
Heat pyrolysis of the oxazines formed from 2-piperidineethanol produced 2,3-dehydropiperidine enamines. The same results were observed when these oxazines were irradiated with microwaves. Various 2-substituted perhydrooxazines were synthesized by allowing 2-piperidineethanol or 2-piperidinemethanol to react with aldehydes or ketones.
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