Efficient Synthesis of Quinazolin-4-ones and Axially Chiral 2,2′-Bisquinazolin-4-ones by Reaction of Anthranilic Acid Derived Nucleophiles with Oxalic Acid-Bis(imidoyl)chlorides - Wuckelt, Jörg; Döring, Manfred; Beckert, Rainer; Langer, Peter (Synlett, 1999)