Optical Resolution of some Auxin-active Thiocarbamates.

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Abstract
Several thiocarbamyl-derivatives of [alpha]-hydroxy- and [alpha]-thiocarboxylic acids have been synthesized and some of them resolved into optical antipodes. The compounds are of plant physiological interest and some of them show stereochemical specificity. The structural requirements for auxin activity have been modified to fit the results of the present investigation. An interesting type of racemization has been observed. The acids are stable in the solid state but are rapidly recemized on melting. The theoretical considerations involved in this phenomenon will be discussed in a subsequent paper.

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