Stereoselective intramolecular cycloadditions of homochiral nitrile imines 5 are described as a fruitful source of enantiopure 3,3a-dihydro- pyrazolo[1,5-a][1,4]benzodiazepine-4(6H)-ones 6 and 7.
Asymmetric induction by the (S)-1-phenylethyl group in intramolecular nitrile imine cycloadditions giving enantiopure 3,3a-dihydro-pyrazolo[1,5-alpha][1,4]benzodiazepine-4(6H)-ones
BROGGINI, GIANLUIGI;ZECCHI, GAETANO ALDO
1999-01-01
Abstract
Stereoselective intramolecular cycloadditions of homochiral nitrile imines 5 are described as a fruitful source of enantiopure 3,3a-dihydro- pyrazolo[1,5-a][1,4]benzodiazepine-4(6H)-ones 6 and 7.
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Tetrahedron Asym. 1999 p.4447 nitrilimmine benzodiazepinoni (41).pdf
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