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A regiocontrolled synthesis of 10-alkoxy and alkyl substituted benzo[b]quinolizinium salts is described. Synthesis of a novel 9-alkoxythiazolo[3,2-b]isoquinolinium cation is reported. In addition the synthesis of several new N-alkylimidazo[1,2-b]isoquinolin-4-ium cations is described. Condensation of dianions (1) with heteroaromatic aldehydes and ketones provides diols in 35-85% yield. Cyclization...
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