3H-Pyrrolo[2,1-f][1,2,4]triazin-4-one Chemical Properties

Density 

1.51±0.1 g/cm3(Predicted)

storage temp. 

2-8°C

pka

8.16±0.20(Predicted)

Appearance

Off-white to light brown Solid

Safety Information

HazardClass 

IRRITANT

HS Code 

2933998090

3H-Pyrrolo[2,1-f][1,2,4]triazin-4-one Usage And Synthesis

Uses

3H-Pyrrolo[2,1-f][1,2,4]triazin-4-one is used in the synthesis of kinase inhibitors as the template for their creation.

Synthesis

Step 2: Synthesis of pyrrolo[2,1-f][1,2,4]triazin-4(3H)-one; Methyl 1-amino-1H-pyrrole-2-carboxylate (7.5 g, 53.5 mmol) was dissolved in formamide (30 mL). The reaction mixture was first heated at 170 °C for 1 h, and then warmed to 190 °C to continue the reaction for 2 h. The reaction was completed by cooling the mixture for 1 h. The reaction was then continued for 2 h. After completion of the reaction, the mixture was cooled to room temperature. The resulting solid was purified by recrystallization from ethyl acetate to afford the target product pyrrolo[2,1-f][1,2,4]triazin-4(3H)-one as a white solid (5.0 g, 37.0 mmol, 69% yield).1H NMR (400 MHz, CDCl3) δ: 7.57 (s, 1H), 7.47 (dd, J = 2.8 Hz, 1.6 Hz (s, 1H), 7.10 (dd, J = 4.4 Hz, 1.6 Hz, 1H), 7.47 (dd, J = 4.4 Hz, 2.8 Hz, 1H).

References

[1] Patent: US2011/183983, 2011, A1. Location in patent: Page/Page column 32

3H-Pyrrolo[2,1-f][1,2,4]triazin-4-one(159326-71-3)Related Product Information

• PYRROLO[1,2-F][1,2,4]TRIAZIN-4-AMINE