GRANISETRON-D3

GRANISETRON-D3 Property

Melting point:

217-219

Boiling point:

417.4±18.0 °C(Predicted)

Density 

1.35

storage temp. 

Sealed in dry,Room Temperature

solubility 

DMSO (Slightly), Methanol (Slightly)

form 

Solid

pka

3.02±0.10(Predicted)

color 

White to Off-White

Safety

Hazard Codes 

Xn

Risk Statements 

22-36-36/37/38-20/21/22

Safety Statements 

26-36/37/39-22

RIDADR 

2811

Hazard Note 

Harmful

HS Code 

29339900

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H332Harmful if inhaled

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

GRANISETRON-D3 Chemical Properties,Usage,Production

Chemical Properties

White Solid

Uses

2-Methyl-2H-indazole-3-carboxylic acid can be used as a reagent used to synthesize 5-HT2A and 5-HT3 receptor ligands for use in treating CNS-related disorders.

Synthesis

(Step 1) Synthesis of 2-methyl-2H-indazole-3-carboxylic acid: 2-methyl-2H-indazole-3-carboxylic acid methyl ester (1.59 g, 8.36 mmol) was dissolved in tetrahydrofuran (85 mL), followed by addition of 0.25 N sodium hydroxide solution (50 mL, 12.5 mmol). The reaction mixture was stirred at room temperature for 24 hours. Upon completion of the reaction, the solvent was removed by distillation under reduced pressure. Water (appropriate amount) was added to the residue, which was then acidified with 1 N hydrochloric acid (50 mL). The precipitate precipitated was collected by filtration under reduced pressure, washed with water and dried under reduced pressure to give 2-methyl-2H-indazole-3-carboxylic acid (1.34 g, 91% yield) as a colorless solid.1H-NMR (DMSO-d6) δ: 4.43 (s, 3H), 7.29 (m, 1H), 7.35 (m, 1H), 7.74 (dd, J = 8.1, 1.0 Hz, 1H), 7.98 (d, J = 8.5 Hz, 1H), 13.59 (broad s, 1H).MS (ESI) m/z 177 (M++1).

References

[1] Journal of Medicinal Chemistry, 1987, vol. 30, # 9, p. 1535 - 1537
[2] Patent: EP1346982, 2003, A1
[3] Letters in Organic Chemistry, 2011, vol. 8, # 10, p. 722 - 727
[4] Patent: WO2008/61688, 2008, A1. Location in patent: Page/Page column 21