Practical Syntheses of Both Enantiomers of the Conformationally Restricted GABA Analogue<i>cis</i>-(2-Aminocyclobutyl)acetic Acid
作者:Hawraà Awada、Sylvie Robin、Régis Guillot、Ogaritte Yazbeck、Daoud Naoufal、Nada Jaber、Ali Hachem、David J. Aitken
DOI:10.1002/ejoc.201402676
日期:2014.11
Two efficient routes have been established for the preparation of both enantiomers of cis-(2-aminocyclobutyl)acetic acid, a conformationally restricted analogue of GABA. Both procedures converged on the racemic N-tert-butoxycarbonyl derivative of the target compound, which was resolved through chiral derivatization with an oxazolidinone auxiliary, which also allowed determination of the absolute configuration
β-Cyclodextrin-Mediated Enantioselective Photochemical Electrocyclization of 1,3-Dihydro-2<i>H</i>-azepin-2-one
作者:Ali T. Mansour、Julien Buendia、Juan Xie、François Brisset、Sylvie Robin、Daoud Naoufal、Ogaritte Yazbeck、David J. Aitken
DOI:10.1021/acs.joc.7b01300
日期:2017.9.15
The photochemical electrocyclization reaction of the title compound in the presence of β-cyclodextrin was examined in different conditions. No enantioselectivity was observed in solution, but solid-state reactions of a 1:1 complex as a suspension or a thin film, followed by reduction, provided (1R,5R)-2-azabicyclo[3.2.0]heptan-3-one in isolated yields up to 79% and with ee values up to 45%.