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Glutaconic anhydride (9) reacts with N‐substituted benzimidoyl chlorides 3 to give the corresponding (Z)‐3‐[(amino)(phenyl)methylene]pyrandiones 12, whereas with 1‐chloroisoquinoline (4) the benzo[a]quinolizinone 13 is obtained. The reactions of α‐methylhomophthalic anhydride (10) with 3 and the imidate 7 lead to the 1 (2H)‐isoquinolinones 14 and 19, respectively, and with 4 to the 13‐methyldibenzo[a,g]quinolizinone 15. The interaction of homophthalic anhydrides 1a, b with 3 aiming at the preparation of α‐condensation products is investigated.
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Stanoeva et al. (1984) studied this question.
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