Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

6-Bromo-1-methylindolin-2-one synthesis

3synthesis methods
-

Yield: 65%

Reaction Conditions:

with hydrazine hydrate at 100 - 125; for 2 h;

Steps:

I-3.3.2 Synthesis of Intermediate 1-3.2
1-3.1 (397 mg, 1.65 mmol) and hydrazine hydrate (1 mL, 20.6 mmol) are heated to 100 °C for 1 h and at 125 °C for 1 h. To the cool reaction mixture DCM and water are added and the aqueous layer extracted twice with DCM. The combined organic layers are washed with brine, dried, concentrated and the residue purified via column chromatography (using solvent mixture cyclohexane / EA = 3:1). Yield 65%. m/z 226 [M+H]+, m/z 224 [M+H]-, rt 0.58 min, LC-MS Method b.

References:

BOEHRINGER INGELHEIM INTERNATIONAL GMBH;GRUNDL, Marc;OOST, Thorsten;PAUTSCH, Alexander;PETERS, Stefan;RIETHER, Doris;WIENEN, Wolfgang WO2013/41497, 2013, A1 Location in patent:Page/Page column 36