AMINAL EXCHANGE

Reactions of N-(alpha-benzotriazolylalkyl)-N,N-dialkylamines with the dialkylamine corresponding to the dialkylamino substituent afford symm etrical aminals in good yields. Treatment with other dialkylamines giv es mixtures of the unsymmetrical and the two symmetrical aminals. Cros s-over experiments of symmetrical aminals demonstrates interconversion s involving iminium ions and that equilibria exist in the systems.