Molecules 2004, 9(5), 373-382; doi:10.3390/90500373
A Novel Strategy Towards the Asymmetric Synthesis of Orthogonally Funtionalised 2-N-Benzyl-N-α-methylbenzylamino- 5-carboxymethyl-cyclopentane-1-carboxylic acid.
Departamento de Química Orgánica, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008, Salamanca, Spain
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Received: 15 March 2004 / Revised: 24 March 2004 / Accepted: 24 March 2004 / Published: 30 April 2004
(This article belongs to the Special Issue Carbanion chemistry from Carboxylic acids in honor of Prof. Ramón Mestres on his 65th anniversary)
Abstract
The asymmetric synthesis of the orthogonally funtionalised compounds tert-butyl 2-N-benzyl-N-α-methylbenzylamino-5-methoxycarbonylmethylcyclopentane- 1-carboxylate and methyl 2-N-benzyl-N-α-methylbenzylamino-5–carboxymethylcyclo- pentane-1-carboxylate by a domino reaction of tert-butyl methyl (E,E)-octa-2,6- diendioate with lithium N-α-methylbenzyl-N-benzylamide initiated by a Michael addition, subsequent 5-exo-trig intramolecular cyclisation and posterior selective hydrolysis with trifluoroacetic acid is reported. View Full-TextKeywords:
Asymmetric synthesis; chiral lithium amide; β-amino acids; domino reaction; β-aminocyclopentane carboxilate; aminodiester orthogonal protection.
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Garrido, N.M.; El Hammoumi, M.M.; Díez, D.; García, M.; Urones, J.G. A Novel Strategy Towards the Asymmetric Synthesis of Orthogonally Funtionalised 2-N-Benzyl-N-α-methylbenzylamino- 5-carboxymethyl-cyclopentane-1-carboxylic acid.. Molecules 2004, 9, 373-382.
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