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Sigma-Aldrich

3-Hydroxyisoquinoline

99%

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Synonym(s):
3-Isoquinolinol
Empirical Formula (Hill Notation):
C9H7NO
CAS Number:
Molecular Weight:
145.16
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.22

Quality Level

Assay

99%

form

solid

mp

192-194 °C (lit.)

SMILES string

Oc1cc2ccccc2cn1

InChI

1S/C9H7NO/c11-9-5-7-3-1-2-4-8(7)6-10-9/h1-6H,(H,10,11)

InChI key

GYPOFOQUZZUVQL-UHFFFAOYSA-N

General description

Two excited state proton transfer mechanisms of 3-hydroxyisoquinoline (3HIQ) in cyclohexane and acetic acid has been investigated by time-dependent density functional theory (TDDFT). Spectral and photo physical properties of 3-HIQ in various protic/aprotic solvents were studied. Phototautomerization of 3-HIQ has been reported. Oxo-hydroxy tautomerism and phototautomerism of 3-HIQ has been studied using the matrix-isolation technique.

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Precautionary Statements

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Anna Gerega et al.
The journal of physical chemistry. A, 111(23), 4934-4943 (2007-05-22)
Oxo-hydroxy tautomerism and phototautomerism of 2-quinolinone, 1-isoquinolinone, 3-hydroxyisoquinoline, 2-quinoxalinone, and 4-quinazolinone were studied using the matrix-isolation technique. These compounds contain a benzene ring fused with a heterocyclic ring of 2-pyridinone, 2-pyrazinone, or 4-pyrimidinone. It turned out that direct attachment of
Jiajia Guo et al.
Organic & biomolecular chemistry, 13(4), 1179-1186 (2014-11-28)
An efficient and enantioselective strategy to synthesize benzoindolizidines from α,β-unsaturated amino ketones via domino intramolecular aza-Michael addition/alkylation was developed. These reactions were enabled by cinchona alkaloid-derived quaternary ammonium salts as the phase-transfer catalyst. A variety of benzoindolizidines were prepared in
Neeraj Kumar Joshi et al.
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 13(6), 929-938 (2014-04-15)
In the present work we report the spectral and photophysical properties of 3-hydroxyisoquinoline in various protic/aprotic solvents. Our steady state and time resolved fluorescence data indicates that in the monomer form of 3HIQ phototautomerization can take place in the excited
Jinfeng Zhao et al.
Physical chemistry chemical physics : PCCP, 17(2), 1142-1150 (2014-11-25)
Two excited state proton transfer mechanisms of 3-hydroxyisoquinoline (3HIQ) in cyclohexane and acetic acid (ACID) were investigated based on the time-dependent density functional theory (TDDFT), suggesting a different double-proton transfer mechanism from the one proposed previously (J. Phys. Chem. B

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