Reaction of guaiazulene with o-formylbenzoic acid in diethyl ether (or methanol) in the presence of hexafluorophosphoric acid: comparative studies on 1H and 13C NMR spectral properties of 3-guaiazulenylmethylium- and 3-guaiazulenium-ion structures

Tetrahedron

Volumn 63, Issue 11, 2007, Pages 2472-2481

  Takekuma, Shin ichi ^a   Sonoda, Kazutaka ^a   Fukuhara, Chika ^a   Minematsu, Toshie ^a  

^a KINKI UNIVERSITY   (Japan)

Author keywords

3 (3 Guaiazulenyl) 2 benzofuran 1(3H) one; Carbenium ions; Guaiazulene; NMR studies; o Formylbenzoic acid; Properties

Indexed keywords

(3 GUAIAZULENYL)[2 (METHOXYCARBONYL)PHENYL]METHANE; (3 GUAIAZULENYL)[2 (METHOXYCARBONYL)PHENYL]METHYLIUM HEXAFLUOROPHOSPHATE; (3 GUAIAZULENYL)[4 (METHOXYCARBONYL)PHENYL]METHYLIUM HEXAFLUOROPHOSPHATE; 3 (3 GUAIAZULENYL) 2 BENZOFURAN 1(3H) ONE; [2 (CARBOXY)PHENYL](3 GUAIAZULENYL)METHYLIUM HEXAFLUOROPHOSPHATE; BENZENE DERIVATIVE; BENZOFURAN DERIVATIVE; BENZOIC ACID DERIVATIVE; ETHER; GUAIAZULENE; HEXAFLUOROPHOSPHORIC ACID; METHANOL; PHOSPHORIC ACID DERIVATIVE; PHTHALALDEHYDIC ACID; TRIFLUOROACETIC ACID; UNCLASSIFIED DRUG;

ARTICLE; CARBON NUCLEAR MAGNETIC RESONANCE; CHEMICAL BOND; CHEMICAL REACTION; CHEMICAL STRUCTURE; COMPARATIVE STUDY; PRIORITY JOURNAL; PROTON NUCLEAR MAGNETIC RESONANCE; QUANTITATIVE ANALYSIS; TEMPERATURE; X RAY CRYSTALLOGRAPHY;

EID: 33846820420     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tet.2006.12.094     Document Type: Article

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36. 1H NMR signals for this sample led us to a ca. 1:1 equilibrium mixture of 7 and 8 under this measurement conditions.
37. 3CN) nm (log ε) 213 (4.10), 244 (4.39), 284 (4.61), 301sh (4.03), 348 (3.65), 365 (3.46), 600 (2.68), 648sh (2.61), and 721sh (2.20).
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