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Syntheses of triazolo[6,7‐ d ]phthalide and triazolo[6,7‐ d ]dihydrocoumarin
Author(s) -
Katritzky Alan R.,
Ji FuBao,
Fan WeiQiang,
Beretta Paolo,
Bertoldi M.
Publication year - 1992
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.5570290624
Subject(s) - phthalide , chemistry , yield (engineering) , tautomer , carbon 13 nmr , bicyclic molecule , stereochemistry , organic chemistry , materials science , metallurgy
Abstract Triazolo[6,7‐ d ]phthalide has been synthesized in a seven step sequence from phthalide in 24% overall yield, and triazolo[6,7‐ d ]dihydrocoumarin has been prepared in nine steps from dihydrocoumarin in 20% overall yield. The 1 H and 13 C nmr spectra and the tautomeric equilibria of the final compounds and intermediates are discussed.