2,4-Piperadinedione

2,4-Piperadinedione Property

Melting point:

98.0 to 102.0 °C

Boiling point:

362.1±35.0 °C(Predicted)

Density 

1.184±0.06 g/cm3(Predicted)

storage temp. 

under inert gas (nitrogen or Argon) at 2-8°C

form 

powder to crystal

pka

12.00±0.70(Predicted)

color 

White to Orange to Green

InChI

InChI=1S/C5H7NO2/c7-4-1-2-6-5(8)3-4/h1-3H2,(H,6,8)

InChIKey

RDNZDMDLRIQQAX-UHFFFAOYSA-N

SMILES

N1CCC(=O)CC1=O

Safety

Hazard Codes 

Xn

Risk Statements 

22-36/37/38-43

Safety Statements 

26-36/37

RIDADR 

UN 3335

WGK Germany 

3

HS Code 

2933790090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H317May cause an allergic skin reaction

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

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

P302+P352IF ON SKIN: wash with plenty of soap and water.

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

2,4-Piperadinedione Chemical Properties,Usage,Production

Description

2,4-Piperidinedione is an important piperidine ring-containing intermediate, and its 2,4-piperidinedione, as a characteristic fragment, is widely used as an intermediate in the synthesis of ibrutinib and paliperidone drugs.

Chemical Properties

White to light yellow solid

Uses

2,4-Piperidinedione is a reactant in the synthesis of 1,4-dihydropyridines as TGFβ/Smad inhibitors.

Preparation

The synthesis of 2,4-Piperidinedione involved dissolving 400 mg (2.34 mmol, 1.00 eq.) of Methyl 2,4-dioxo-piperidine-3-carboxylate in a mixture of acetonitrile (20 mL) and water (0.2 mL). The solution was then heated to approximately 86° C. and maintained at this temperature for around 4 hours. After completion of the reaction, the solvent was removed under vacuum, leaving behind a residue of 2,4-Piperidinedione. This residue was further purified using silica gel column chromatography with a mobile phase consisting of dichloromethane and methanol in a ratio of 100:1. The target product, 2,4-Piperidinedione, was obtained as a white solid, with a yield of 27%, corresponding to 70 mg.

Synthesis

The general procedure for the synthesis of 2,4-piperidinediones from tert-butyl 2,4-dipiperidone-1-carboxylate was as follows: at 0 °C and under nitrogen protection, Boc-β-alanine (25 g, 132 mmol), Meldrum acid (20.9 g, 145 mmol), and 4-dimethylaminopyridine (DMAP, 24.2 g, 198 mmol) were dissolved in 700 mL of anhydrous dichloromethane (DCM). To this solution was added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI, 30.4 g, 158 mmol). The reaction mixture was slowly warmed to room temperature and stirred overnight. After completion of the reaction, the reaction mixture was washed with 5% KHSO4 aqueous solution (0.5 L x 4). The organic layer was dried with anhydrous sodium sulfate, filtered and concentrated under reduced pressure to give the crude product [tert-butyl [3-(2,2-dimethyl-4,6-dioxo-[1,3]dioxol-5-yl)-3-oxo-propyl]-carbamate. The crude product was dissolved in 600 mL of ethyl acetate and refluxed for 4 hours. It was concentrated under reduced pressure to a volume of about 150 mL and subsequently crystallized at 4°C overnight. The solid was collected by filtration and washed with cold ethyl acetate to afford 18.4 g (65% yield) of 2,4-piperidinedione.1H NMR (400 MHz, DMSO-D6) δppm: 1.44 (s, 9H), 2.44 (m, 2H), 3.71 (m, 2H), 4.95 (s, 1H), 11.2 (bs, 1H). The resulting product was converted quantitatively to piperidine-2,4-dione by dissolving in dichloromethane and treating with trifluoroacetic acid for 3 h at room temperature.

References

[1] Patent: WO2008/104475, 2008, A1. Location in patent: Page/Page column 22
[2] Patent: WO2012/35078, 2012, A1. Location in patent: Page/Page column 144
[3] Patent: US2014/45872, 2014, A1. Location in patent: Paragraph 0911
[4] Journal of Medicinal Chemistry, 2008, vol. 51, # 3, p. 487 - 501
[5] Angewandte Chemie - International Edition, 2014, vol. 53, # 14, p. 3594 - 3598