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N-(1,3-Thiazol-5(4H)-yliden)amine aus 1,3-dipolaren Cycloadditionen von Aziden mit 1,3-Thiazol-5(4H)-thionen

✍ Scribed by Sare Pekcan; Heinz Heimgartner


Publisher
John Wiley and Sons
Year
1988
Tongue
German
Weight
458 KB
Volume
71
Category
Article
ISSN
0018-019X

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✦ Synopsis


N-(I ,3-Thiazol-5(4H)-ylidene)amines via 1,3-Dipolar Cycloaddition of Azides and 1,3-Thiazol-5(4H)-thiones Organic azides 5 and 4,4-dimethyl-2-phenyI-1,3-thiazol-5(4H)-thione (2) in toluene at 90" react to give the corresponding N-(1,3-thiazol-5(4H)-ylidene)amines ( = 1,3-thiazol-5(4H)-imines) 6 in good yield (Table ). A reaction mechanism for the formation of these scarcely investigated thiazole derivatives is formulated in Scheme 3:

1,3-Dipolar azide cycloaddition onto the C=S group of 2 leads to the 1 : 1 adduct C. Successive elimination of N, and S yields 6, probably uiu an intermediate thiaziridine E.


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