Author:
Baradarani Mehdi M.,Khalafy Jabbar,Prager Rolf H.
Abstract
The flash vacuum pyrolysis (f.v.p.) products of
2-(1H-benzotriazol-1-ylcarbonyl)benzonitrile, methyl
2-(1H-benzotriazol-1-ylcarbonyl)benzoate and
1-(2-chloromethylbenzoyl)-1H-benzotriazole and the cor-
responding benzisoxazolones have been characterized. The benzotriazole
derivatives gave compounds whose origin suggests the predominance of radical
processes. At lower temperatures the benzisoxa- zolones gave benzoxazole
products consistent with a singlet carbene intermediate, but which had triplet
diradical properties at higher temperatures, leading to the formation of
acridine from the chloromethyl compound. The major low-temperature f.v.p.
product from the (chloromethylbenzoyl)benzisoxazolone was
indolo[1,2-b]benzoxazole.
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