Bettina Bakonyi, Markus Furegati, C. Kramer
Aug 28, 2013
Citations
0
Influential Citations
14
Citations
Journal
The Journal of organic chemistry
Abstract
A synthesis of all four stereoisomers of 3-(tert-butoxycarbonyl)-3-azabicyclo[3.1.0]hexane-2-carboxylic acid has been developed, thereby significantly shortening the known literature procedures for the syntheses of these unnatural amino acids. With a simple adjustment of the reaction conditions, we were able to obtain either pure cis or trans acid. Optical resolution was accomplished via diastereomeric salt formation or alternatively via chromatography on a chiral stationary phase. Finally, ab initio calculations gave an explanation for the observed cis selectivity in the initial step.