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On the Mechanism of the Reactions of 4-Alkyl-5-Arylimino-1,2,3,4-Thiatriazolines with Isocyanates

✍ Scribed by Gerrit L'abbé; Ernestine Albrecht

Publisher: Wiley (John Wiley & Sons)
Year: 2010
Weight: 108 KB
Volume: 100
Category: Article
ISSN: 0037-9646
DOI: 10.1002/bscb.19911000105

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✦ Synopsis

Although the first cycloaddition-elimination reactions of 4-alkyl-5-arylimino-1,2,3,4-thiatriazolines (1) with heterocumulenes were reported in 1976-78,' insight into the mechanistic puzzle has been gained recently, and then only for isothiocyanates.2 For isocyanates, which furnish l ,2,4-thiadiazolidines, two reaction paths can be considered (Scheme l ) . All our previous experiments on the title reactions yielded products of type 3a-c, having the aryl substituent

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