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Valence isomerization of imidoyl isothiocyanates

✍ Scribed by Herbert M. Blatter; Halina Lukaszewski

Publisher
Elsevier Science
Year
1964
Tongue
French
Weight
267 KB
Volume
5
Category
Article
ISSN
0040-4039

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✦ Synopsis

We wish to report the prepsration and novel ring closure reaction of a new class of canpounds, the imldoyl isothlocyanates (I) (1). Imldoylisothlocyauates, prepared frcm lmidoylchlorides andmetalthlocyanates In solvents such as benzene, readily ring close to 4(5E)-qulnazoliuethiones (II) (2) often at temperatures as low as 80" (refluxing benzene). This ring closure, typified by the examples in Table I (J), represents a unique general synthesis of 4(3H)-qulnazollnethiones, and Is apparently the first such of this class of cmpounds to be Independent of the use of anthranili~ acid derivatives (5,6). It should be noted that closure occurs regardless of the presence of electron withdrawing substltuents such as l

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