ISSN:
0941-1216
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Ring Transformations of Pyrazolinones via Azoolefins - a New Way to the 1,2,3-Thiadiazol-SystemElektrophilic attack of thiocyanate/bromine to azoenamine (2a) yields thiocyanato compound 3a which cyclizes into 1,2,3-thiadiazolium-salt (5a) on treatment with perchloric acid. 2-Halo-3-arylazo-propenamides (8) form directly thiadiazolium-salts (11) with KSCN/HOAc. The addition of N- or O-nucleophiles to 11 occurs in the 5-position to form 1,2,3-thiadiazolines (13).
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19933350209
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