Commensurately, an increasing variety of methods have been described for the synthesis of b-amino acids in both racemic and enantiomerically enriched form. 5 A particular interest has developed for alicyclic b- aminoacids; 6 these compounds are of biological interest in their own right, 6,7 while hybrid or homo-oligomers which contain these rigid cyclic motifs pre-organize in a well-defined manner leading to unique
Synthesis of (+)-(1S,2R) and (−)-(1R,2S)-2-aminocyclobutane-1-carboxylic acids
作者:Christine Gauzy、Elisabeth Pereira、Sophie Faure、David J. Aitken
DOI:10.1016/j.tetlet.2004.07.110
日期:2004.9
(+)-(1S,2R) and (−)-(1R,2S)-2-aminocyclobutane-1-carboxylic acids have been prepared in >97% ee and in 33% and 20% overall yields starting from a single, chiral, bicyclic compound perceived as a chiral uracil equivalent. Construction of the cyclobutane ring is achieved via a [2+2] photocycloaddition reaction of this chiral precursor with ethylene.