133575-76-5Relevant articles and documents
A PRACTICAL SYNTHESIS, OPTICAL RESOLUTION AND DETERMINATION OF ABSOLUTE CONFIGURATION OF ENANTIOMERICALLY PURE 1S,2R-(+)- AND 1R,2S-(-)-CIS-2-(1-PYRROLIDINYL)CYCLOHEXYLAMINES: IMPORTANT PRECURSORS FOR A NEW CLASS OF SIGMA-RECEPTOR LIGANDS AND ANTICONVULSANT DRUGS
Costa, Brian R. de,Radesca, Lilian
, p. 1837 - 1846 (2007/10/02)
Enantiomerically pure (+)- and (-)-cis-2-(1-pyrrolidinyl)cylohehexylamines ((+)- and (-)-4) were prepared starting with (+/-)-trans-2-aminocyclohexanol ((+/-)-5).The key step in the generation of the cis stereochemistry of (+)- and (-)-4 empolyed catalytic hydrogenation of the enamine mixture generated from condensation of pyrrolidine with (+/-)-2-(benzamido)cyclohexanone ((+/-)-7).An efficient optical resolution of (+/-)-4 was achieved through two recrystallizations of the mandelate salts.The absolute configuration of (+)- and (-)-4 was assigned as 1S,2R and 1R,2S,respectively, based on conversion of (-)-4 to and comparison with the N-methyl derivative (-)-13 of known 1R,2S absolute configuration.