Abstract <p>Molecular and crystal structures of the following bispidine conjugates with stable TEMPO radicals and their synthetic precursors are described for the first time: 4-(2-bromacetoamido)-2,2,6,6-tetramethylpiperidine-1-oxyl (<b>2</b>), <i>tert-butyl-</i>3,7-diazabicyclo[3.3.1]nonan-3-carboxylate (<b>4</b>), 2-(1-oxyl-2,2,6,6-tetramethylpiperidine-4-yl)acetamide (3,7-diazabicyclo[3.3.1]nonan-3-carboxylate (<b>6</b>) and 2,2′-(1,5-dimethyl-3,7-diazabicyclo[3.3.1]nonan-3,7-diyl)bis[<i>N</i>-(2,2,6,6-tetramethyl-1-oxyl-piperidine-4-yl)acetamide] (<b>7</b>). These conjugates are prepared by the alkylation of bispidines using TEMPO bromo-derivatives.</p>

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Molecular and Crystal Structures of Bispidine Conjugates and Tempo Radicals

  • A. V. Medved′ko,
  • A. M. Zakirov,
  • M. E. Minyaev,
  • E. V. Tretyakov,
  • S. Z. Vatsadze

摘要

Abstract

Molecular and crystal structures of the following bispidine conjugates with stable TEMPO radicals and their synthetic precursors are described for the first time: 4-(2-bromacetoamido)-2,2,6,6-tetramethylpiperidine-1-oxyl (2), tert-butyl-3,7-diazabicyclo[3.3.1]nonan-3-carboxylate (4), 2-(1-oxyl-2,2,6,6-tetramethylpiperidine-4-yl)acetamide (3,7-diazabicyclo[3.3.1]nonan-3-carboxylate (6) and 2,2′-(1,5-dimethyl-3,7-diazabicyclo[3.3.1]nonan-3,7-diyl)bis[N-(2,2,6,6-tetramethyl-1-oxyl-piperidine-4-yl)acetamide] (7). These conjugates are prepared by the alkylation of bispidines using TEMPO bromo-derivatives.