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The use of different aluminum derivatives in the reaction between cyclopentadiene and (Z)-2-phenyl-4-arylidene-5(4H)-oxazolones, and in particular the use of different equivalents of the reagent, allows the modulation of the synthesis of the norbornane skeleton by a [4+2] cycloaddition or the more interesting bicyclo[3.2.1]octane framework by a [4+3] cycloaddition followed by nucleophilic trapping...
Imines derived from O-protected (S)-glyceraldehyde are valuable intermediates in the synthesis of different kinds of amino acids. We have developed a highly convergent and stereoselective method to obtain (2S,3S)-N-tert-butoxycarbonyl-1-phenyl-3,4-epoxy-2-butylamine and (2S,4R)-N-tert-butoxycarbonyl-4-hydroxypipecolic acid tert-butylamide, which are key intermediates in the synthesis of Palinavir,...
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