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Synthesis and crystal structure of 2,6-dibromo-3,7-dimethyl-1H,5H-pyrazolo[1,2-a]Pyrazole-1,5-dione

โœ Scribed by Walter G. Blenderman; Patrick J. Carroll; Prof. Dr. Madeleine M. Joullie'; Terrance G. Ulatowski; Norman H. Nemeroff


Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
169 KB
Volume
328
Category
Article
ISSN
1615-4150

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A convenient synthesis of pyrazolidine a
โœ Eric E. Boros; Frรฉdรฉric Bouvier; Sab Randhawa; Michael H. Rabinowitz ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› Journal of Heterocyclic Chemistry ๐ŸŒ English โš– 36 KB

## Abstract A convenient fourโ€step synthesis of the aminobicyclopyrazolone hydrochloride **1**ยทHC1 was achieved starting from diโ€__tert__โ€butyl hydrazodiformate **(8)**. The route entails cyclization of **8** with 1,3โ€dibromopropane under phase transfer conditions followed by deprotection of 1,2โ€di