Abstract Study of a reaction of 1, 5-diazabicyclo [3.1. 0] hexanes with acyl and sulfonyl chlorides in organic or aqueous organic media in the presence of inorganic bases resulted in development of new simple one-step methods for the preparation of 1-mono-and 1, 2- bisacylpyrazolidines and 1-arylsulfonylpyrazolines.
[Shevtsov, Alexander V.; Kuznetsov, Vladimir V.; Kislukhin, Alexander A.; Petukhova, Vera Yu.; Strelenko; Makhova, Nina N.; Lyssenko, Konstantin A. Journal of Heterocyclic Chemistry, 2006 , vol. 43, # 4 p. 881 - 888]
![2,3-dihydro-1H-pyrazolo[1,2-b]phthalazine-5,10-dione结构式](https://image.chemsrc.com/caspic/389/21769-81-3.png)