245655-87-2Relevant academic research and scientific papers
Stereoselective intramolecular cycloadditions of homochiral nitrile imines: Synthesis of enantiomerically pure 3,3a-dihydro-pyrazolo[1,5-a][1,4]benzodiazepine-6(4H)-ones
Broggini, Gianluigi,Garanti, Luisa,Molteni, Giorgio,Pilati, Tullio,Ponti, Alessandro,Zecchi, Gaetano
, p. 2203 - 2212 (2007/10/03)
Starting from the commercially available (S)-1-phenylethylamine, we have synthesised the homochiral hydrazonoyl chlorides 4. The intramolecular cycloaddition of the corresponding nitrile imines 5 gave the diastereoisomeric 3,3a-dihydro-pyrazolo[1,5-a][1,4]benzodiazepine-6(4H)-ones 6 and 7 in enantiopure form.
