4-chloro-1H-pyrrolo[2,3-b]pyridin-2(3H)-one Chemical Properties

Boiling point:

373.0±42.0 °C(Predicted)

Density 

1.450±0.06 g/cm3(Predicted)

storage temp. 

Storage temp. 2-8°C

pka

11.65±0.20(Predicted)

Appearance

White to light brown Solid

InChI

InChI=1S/C7H5ClN2O/c8-5-1-2-9-7-4(5)3-6(11)10-7/h1-2H,3H2,(H,9,10,11)

InChIKey

MUJHLWISGAWFPZ-UHFFFAOYSA-N

SMILES

C12NC(=O)CC1=C(Cl)C=CN=2

Safety Information

RIDADR 

UN2811

HS Code 

2933998090

4-chloro-1H-pyrrolo[2,3-b]pyridin-2(3H)-one Usage And Synthesis

Uses

4-Chloro-1H-pyrrolo[2,3-B]pyridine-2(3H)-one is a ketone derivative that can be used as a pharmaceutical intermediate.

Synthesis

To a solution of 3,3-dibromo-4-chloro-1H-pyrrolo[2,3-b]pyridin-2(3H)-one (350 mg, 1.072 mmol) in methanol (5 mL) was added acetic acid (5 mL), followed by addition of zinc powder (351 mg, 5.36 mmol) in batches. The reaction mixture was stirred at room temperature for 1 hour. After completion of the reaction, the mixture was diluted with ethyl acetate (50 mL) and filtered through diatomaceous earth. The filtrate was neutralized with 10% aqueous sodium bicarbonate. The organic layer was separated, dried over anhydrous sodium sulfate, filtered and concentrated to give a brown solid. The solid was washed with hexane (2 x 20 mL) to afford 4-chloro-1H-pyrrolo[2,3-b]pyridin-2(3H)-one (164 mg, 0.973 mmol, 91% yield) as an off-white solid. lcms (ESI) m/z 168.9 [M+H]+ (calculated value C7H6ClN2O, 169.01); lc/ms retention time (Method B): tR = 0.58 min.

References

[1] Patent: WO2017/59080, 2017, A1. Location in patent: Page/Page column 122
[2] Patent: WO2007/125325, 2007, A1. Location in patent: Page/Page column 86-87
[3] Patent: WO2007/125320, 2007, A1. Location in patent: Page/Page column 135
[4] Patent: US2002/183319, 2002, A1
[5] Patent: WO2014/713, 2014, A1. Location in patent: Page/Page column 42

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