Synthesis of 2‐(3‐tropolonyl)‐1‐benzopyrylium perchlorates and related compounds | Zendy

Wang DaoLin | Zendy; Lu DuRen | Zendy; Jin ZhongTian | Zendy; Imafuku Kimiaki | Zendy

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Synthesis of 2‐(3‐tropolonyl)‐1‐benzopyrylium perchlorates and related compounds

Author(s) -

Wang DaoLin,

Lu DuRen,

Jin ZhongTian,

Imafuku Kimiaki

Publication year - 1995

Publication title -

journal of heterocyclic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.321

H-Index - 59

eISSN - 1943-5193

pISSN - 0022-152X

DOI - 10.1002/jhet.5570320405

Subject(s) - chemistry , perchloric acid , triethyl orthoformate , perchlorate , medicinal chemistry , organic chemistry , catalysis , ion

3‐Acetyltropolone ( 1 ) reacted with 2‐hydroxybenzaldehyde ( 3a ) in the presence of perchloric acid in ethyl orthoformate to afford 2‐(3‐tropolonyl)‐1‐benzopyrylium perchlorate ( 4a ). The reactions with 2‐hydroxy‐5‐methylbenzaldehyde ( 3b ), 5‐chloro‐2‐hydroxybenzaldehyde ( 3c ), and 2‐hydroxy‐1‐naphthalde‐hyde ( 3d ) gave respectively the corresponding products 4b‐d . The reactions of 2‐acetyl‐7‐methylamino‐tropone ( 2 ) with 3a‐d also gave the corresponding products 5a‐d , respectively.

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