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N-Tosyl-5-bromo-4,7-diazaindole

N-Tosyl-5-bromo-4,7-diazaindole Structure
CAS No.
1201186-54-0
Chemical Name:
N-Tosyl-5-bromo-4,7-diazaindole
Synonyms
2-BroMo-5-tosyl-5H-pyrrolo[2,3-b]pyrazine;5H-Pyrrolo[2,3-b]pyrazine, 2-bromo-5-[(4-methylphenyl)sulfonyl]-;Upatinib Impurity 2;Upatinib Impurity 45;Upadacitinib Impurity 2;Upadacitinib Impurity 45;N-Tosyl-5-bromo-4,7-diazaindole;Glycerol(Glycerophosphoric acid);3-Bromo-5-tosyl-5H-pyrrolo[2,3-b]pyrazine;2-BROMO-5-(P-TOLYLSULFONYL)-5H-PYRROLO[2,3-B]PYRAZINE
CBNumber:
CB62470216
Molecular Formula:
C13H10BrN3O2S
Molecular Weight:
352.21
MOL File:
1201186-54-0.mol
MSDS File:
SDS
Modify Date:
2024/4/7 18:44:46

N-Tosyl-5-bromo-4,7-diazaindole Properties

Boiling point 499.6±55.0 °C(Predicted)
Density 1.68±0.1 g/cm3(Predicted)
storage temp. under inert gas (nitrogen or Argon) at 2-8°C
pka -2.22±0.30(Predicted)

SAFETY

Risk and Safety Statements

Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P261-P305+P351+P338

N-Tosyl-5-bromo-4,7-diazaindole Chemical Properties,Uses,Production

Uses

N-Tosyl-5-bromo-4,7-diazaindole is an intermediate of upadacitinib, known asupadacitinib intermediate, or upadacitinib impurity 2. As an inhibitor of Janus kinase1, upadacitinib selectively inhibits Janus kinase1 for immune system diseases such as psoriatic arthritis, rheumatoid arthritis, and Crohn's disease[1-3].

Preparation

A solution of anhydrous DMF (272 mL) dissolved with 2-bromo-5H-pyrrolo[2,3-b]pyrazine (78.0 g, 394 mmol) was configured. The temperature is maintained at 0-5 °C (within which the subsequent reaction has been maintained), and the solution was droppedly added to the sodium (12.8 g, 532 mmol) anhydrous DMF (543 mL) suspension in the stirred state within 60 minutes. The solution turned brown and the reaction solution was stirred for about 30 min. Then, within 60 minutes, anhydrous DMF (272 mL) dissolved with p-toluenesulfonyl chloride (94.0 g, 492 mmol) was added. After stirring the mixed solution for about 1 h, it was heated to ambient temperature and stirred for about 18 h. Slowly pour the reaction mixture into ice water (6 L) and added 2.5 N NaOH in water (50.0 mL, 125 mmol). Filter the sediment to collect and stirred 3 times with cold water (200 mL). Finally, the collected products were filtered and dried to a constant weight in a vacuum oven at about 55 °C to obtain N-Tosyl-5-bromo-4,7-diazaindole (134.6 g, 97%).
N-Tosyl-5-bromo-4,7-diazaindole

Safety

N-Tosyl-5-bromo-4,7-diazaindole can cause skin irritation, severe eye irritation, and possibly respiratory irritation.

References

[1] Yael Ross, Marina Magrey, Use of upadacitinib in the treatment of psoriatic arthritis, Immunotherapy, 2021, 13.
[2] Lina Serhal, Christopher J Edwards, Upadacitinib for the treatment of rheumatoid arthritis, Expert Review of Clinical Immunology, 2018, 15,13-25.
[3] Eleni Kotsiliti, Upadacitinib therapy for Crohn’s disease, Nature Reviews Gastroenterology & Hepatology, 2023, 20, 483.

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