Synthesis of Benzo(c)pyrylium Salts from Derivatives of 2-(3,4-Dimethoxyphenyl)succinic Acid and ... more Synthesis of Benzo(c)pyrylium Salts from Derivatives of 2-(3,4-Dimethoxyphenyl)succinic Acid and Their Transformations.-Acid-mediated reaction of 2-arylsuccinic acid derivatives (I) and (V) with acyl perchlorates provides effectively benzopyrylium salts, which recyclize by treatment with N-nucleophiles such as ammonia (→ (IV), (VII)), amines (→ (IX)) or hydrazines (→ (XI)).
Synthesis of Benzo(c)pyrylium Salts from Derivatives of 2-(3,4-Dimethoxyphenyl)succinic Acid and ... more Synthesis of Benzo(c)pyrylium Salts from Derivatives of 2-(3,4-Dimethoxyphenyl)succinic Acid and Their Transformations.-Acid-mediated reaction of 2-arylsuccinic acid derivatives (I) and (V) with acyl perchlorates provides effectively benzopyrylium salts, which recyclize by treatment with N-nucleophiles such as ammonia (→ (IV), (VII)), amines (→ (IX)) or hydrazines (→ (XI)).
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