Synthesis of enantiopure cis- and trans-2-aminocyclohexane-1-carboxylic acids from octahydroquinazolin-4-ones
作者:Jaime Priego、Patricia Flores、Claudia Ortiz-Nava、Jaime Escalante
DOI:10.1016/j.tetasy.2004.08.032
日期:2004.11
The chemoselective and diastereoselective hydrogenation of 2,3-dibydro-3-[(S)-alpha-methylbenzyl]-4-quinazolinone 2 affords octahydroquinazolinones cis-3 and cis-4. Epimerization of cis-3 and cis-4 using t-BuO-K+ produces trans-5 and trans-6, respectively. Hydrolysis with HCl of these octahydroquinazolinones leads to the free, enantiomerically pure, cis- and trans-2-aminocyclohexane-1-carboxylic acids 7-10. (C) 2004 Elsevier Ltd. All rights reserved.