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Conformationally Restricted Nonchiral Pipecolic Acid Analogues

J. Org. Chem. , 2009, 74 (15), 5541-5544

DOI: 10.1021/jo900842w

Radchenko D. S.; Kopylova N.; Grygorenko O. O.; Komarov I. V.

Practical syntheses of 2-azabicyclo[3.1.1]heptane-1-carboxylic (2,4-methanopipecolic), 2-azabicyclo[2.2.2]octane-1-carboxylic (2,5-ethanopipecolic), and 9-azabicyclo[3.3.1]nonane-1-carboxylic (2,6-propanopipecolic) acids are reported. The synthetic schemes are short (five, seven, and five steps, respectively) and result in reasonably high yields of the title compounds. The key step in the syntheses is the tandem Strecker reaction and intramolecular nucleophilic cyclization of ketones possessing a leaving group at the δ-position.

Conformationally Restricted Nonchiral Pipecolic Acid Analogues

Radchenko D. S.; Kopylova N.; Grygorenko O. O.; Komarov I. V.
J. Org. Chem. 2009, 74 (15), 5541-5544
DOI: 10.1021/jo900842w

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