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HomeProduct name list1H-indazole-7-carboxylic acid

1H-indazole-7-carboxylic acid

  • CAS NO.:677304-69-7
  • Empirical Formula: C8H6N2O2
  • Molecular Weight: 162.15
  • MDL number: MFCD06804572
  • EINECS: 410-410-5
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-11-06 19:41:26
1H-indazole-7-carboxylic acid Structural

What is 1H-indazole-7-carboxylic acid?

The Uses of 1H-indazole-7-carboxylic acid

1H-indazole-7-carboxylic Acid is an inhibitor of nitric oxide synthases.

Preparation

Synthesis of 1H-indazole-7-carboxylic acid, H2L4: To 60 mL anhydrous toluene under a nitrogen atmosphere was added methyl-2-amino-3-methylbenzoate (1.8 g, 11 mmol) and KOAc (560 mg, 5.7 mmol), and the mixture heated to reflux, at which time acetic anhydride (3.2 mL, 34 mmol) was added and the mixture stirred at reflux for 10 min. Isoamyl nitrite (2.3 mL, 18 mmol) was added over 30 min and the mixture refluxed overnight. On cooling, the mixture was filtered and evaporated to dryness to give 1.6 g of a pale brown solid, which analysed for methyl 1H-indazole-7-carboxylate. This material was taken up in 40 mL THF, added to a solution of LiOH (5 g, 210 mmol) in 40 mL water, and heated at reflux for 48 h. On cooling, the mixture was concentrated on a rotary evaporator and the resulting aqueous phase filtered and adjusted to pH 4 with dilute HCl, to precipitate the product, which was filtered, washed with water and dried under vacuum. Yield 810 mg, 45%; mp 218–222 °C (decomp);
δH (500 MHz, d6-DMSO): 7.23 (t, 1H, J = 7.5 Hz, H4 ), 7.97 (dd, 1H, J = 7.5, 1.0 Hz, H3 ), 8.06 (dd, 1H, J = 7.8, 0.8 Hz, H5 ), 8.21 (s, 1H, H2 ), 13.1 (br s, 2H, H1 & H6 ); δc (125 MHz, d6-DMSO): 113.7, 120.1, 124.6, 126.5, 129.0, 134.3, 138.0, 167.0; HRMS-ESI m/z: found: 163.0503; C8H7N2O2 requires: 163.0502 [M + H+ ]; ˉνmax/cm?1 (KBr): 3316 s br, 1700 s, 1619 m, 1592 m, 1509 m, 1285 s, 1201 m, 1145 m, 1078 m, 1056 w, 943 m, 858 s, 745 s, 638 m, 601 m.

Properties of 1H-indazole-7-carboxylic acid

Melting point: ca 240℃
Boiling point: 443.7±18.0 °C(Predicted)
Density  1.506±0.06 g/cm3(Predicted)
storage temp.  Sealed in dry,Room Temperature
solubility  DMSO (Slightly), Methanol (Slightly)
pka 3.71±0.10(Predicted)
form  Crystalline Powder
color  White to yellow

Safety information for 1H-indazole-7-carboxylic acid

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes P261:Avoid breathing dust/fume/gas/mist/vapours/spray.
P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405:Store locked up.

Computed Descriptors for 1H-indazole-7-carboxylic acid

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