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The utility of the thermal rearrangement of a-amino ketones, a-hydroxy imines, and imine acid salts for the The 2-aminocyclohexanones were synthesis of a variety of 2-alkylamino-2-phenylcyclohexanones is described. reduced and the stereochemistry of four of the resulting amino alcohols determined.

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Exoribonuclease purified from Ehrlich ascites tumor cell nuclei and in intact HeLa cell nuclei is irreversibly inactivated by tow concentrations of p-bromo- and p-iodoacetamidophenyl nucleotides and by thymidine-3'-fluorophosphate. Iodoacetate, bromoacetate, and thymidine-5'-fluorophosphate do not affect the enzyme. Although p-haloacetamidophenyl nucleotides inactivate ribonucleic acid polymerase of isolated HeLa cell nuclei, thymidine-3'-fluorophosphate does not affect the activity of this enzyme in vitro.

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