Quinazolino-phthalazines

Publications on the synthesis of these compounds have almost always referred to these compounds as phthalazino-quinazolines. The title name, however, conforms better with the IUPAC rule B-3.1 on the nomenclature of organic compounds (73MI3). 

Cyclocondensation of anthranilic acid with l-chlorophthalazines (496) gave examples of the title compounds (497) [61ZC224 67B875 78IJC(B)689]. 

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