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Synthesis of 1-arylacenaphtho[1,2-d]pyrazoles and 5,7-Dehydro-5H,7H-benzo[b]acenaphtho[1,2-e]-1,3a,6a-triazapentalenes

โœ Scribed by Otohiko Tsuge; Taizo Hatta; Hisashi Kojima; Nobutaka Miyahara; Masafumi Sugaya


Book ID
112131031
Publisher
Journal of Heterocyclic Chemistry
Year
1994
Tongue
English
Weight
362 KB
Volume
31
Category
Article
ISSN
0022-152X

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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