Chemoenzymatic enantioselective synthesis of 7-azabicyclo[2.2.1]heptane derivatives
摘要:
The enantioselective acylation (desymmetrization) of meso-7-azabicyclo[2.2.1]heptanediol 2 by vinyl acetate in the presence of Candida antarctica lipase B gave the corresponding (1R,2R,3S,4S)-monoester 4 in high enantiomeric purity (ee >= 98%). (C) 2011 Elsevier Ltd. All rights reserved.
A novel intramolecular Ugi reaction with 7-azabicyclo[2.2.1]heptane derivatives followed by post-condensation acylations: a new entry to azanorbornyl peptidomimetics
The enantioselective acylation (desymmetrization) of meso-7-azabicyclo[2.2.1]heptanediol 2 by vinyl acetate in the presence of Candida antarctica lipase B gave the corresponding (1R,2R,3S,4S)-monoester 4 in high enantiomeric purity (ee >= 98%). (C) 2011 Elsevier Ltd. All rights reserved.
A novel intramolecular Ugi reaction with 7-azabicyclo[2.2.1]heptane derivatives followed by post-condensation acylations: a new entry to azanorbornyl peptidomimetics
β-Amino acids have been employed in the past as bifunctional building blocks in intramolecular Ugi multicomponent reactions to yield β-lactam derivatives. By using 7-azabicyclo[2.2.1]heptane-2-carboxylic acid, a different outcome has been observed and rationalised. The final compounds are polyfunctionalised azabicyclic peptidomimetics, and further elaboration can be achieved exploiting an additional carboxylic group that is not involved in the multicomponent step.