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Amidrazones 11 . Rearrangement of 1‐allyl‐substituted‐4,5‐dihydro‐1‐methyl‐1 H ‐pyrazolium bromides
Author(s) -
Smith Richard F.,
Dennis Lisa A.,
Ryan William J.
Publication year - 1988
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570250212
Subject(s) - propenyl , chemistry , bromide , sodium ethoxide , medicinal chemistry , allyl bromide , organic chemistry , ethanol
1‐Methyl‐2‐(2‐propenyl)‐3‐pyrazolidinimine ( 5 ) was obtained by treatment of 3‐amino‐4,5‐dihydro‐1‐methyl‐ 1‐(2‐propenyl)‐1 H ‐pyrazolium bromide ( 4 ) with ethanolic sodium ethoxide. Similar treatment of the analogous 2‐(2‐butenyl) and 2‐(3‐phenyl‐2‐propenyl)‐substituted salts 12 and 15 gave 1‐methyl‐2‐(1‐methyl‐2‐propenyl)‐3‐ pyrazolidinimine ( 13 ) and 1‐methyl‐2‐(1‐phenyl‐1‐propenyl)‐3‐pyrazolidinimine ( 16 ) respectively.