反应详情

N-((6R,7S)-6-Cyclopropyl-2-fluoro-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-yl)-2-hydroxy-2-methyl-N′-(2,2,3,3,3-pentafluoro-propyl)-malonamide was obtained as mixture of epimers according to the procedures described for example 2b using racemic 2-hydroxy-2-methyl-N-(2,2,3,3,3-pentafluoro-propyl)-malonamic acid and (6R,7S)-7-amino-6-cyclopropyl-2-fluoro-6,7-dihydro-9H-5-oxa-9-aza-benzocyclohepten-8-one. The epimers were separated by chromatography on Chiralpak AD using isopropanol/heptane 15:85 to yield (−)-N-((6R,7S)-6-cyclopropyl-2-fluoro-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-yl)-2-hydroxy-2-methyl-N′-(2,2,3,3,3-pentafluoro-propyl)-malonamide, entity A, MS m/e (%): 484.5 (M+H+, 100), as first eluting fraction, and (−)-N-((6R,7S)-6-cyclopropyl-2-fluoro-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-yl)-2-hydroxy-2-methyl-N′-(2,2,3,3,3-pentafluoro-propyl)-malonamide, entity B, as second eluting fraction, MS m/e (%): 484.5 (M+H+, 100).

1. customThe epimers were separated by chromatography on Chiralpak AD