Hydrochloric Acid → 3-[2-(4-Bromo-phenyl)-2-oxo-ethylcarbamoyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

Participants

Role	Name	HCID	Charge
Reactant	Hydrochloric Acid	HCID 313	—
Reactant	2-Amino-1-(4-bromophenyl)ethanone	HCID 21639	—
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	1-((Tert-butoxy)carbonyl)pyrrolidine-3-carboxylic acid	HCID 2760529	—
Reactant	Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)	HCID 9886157	—
Solvent	Dimethylformamide	HCID 6228	—
Product	3-[2-(4-Bromo-phenyl)-2-oxo-ethylcarbamoyl]-pyrrolidine-1-carboxylic acid tert-butyl ester	HCID 59611512	—

Reaction Steps

N,N-diisopropylethylamine (5.3 mL, 30.6 mmol) was added dropwise to a mixture of pyrrolidine-1,3-dicarboxylic acid 1-tert-butyl ester (2.2 g, 10.1 mmol), HATU (4.0 g, 10.5 mmol), the HCl salt of 2-amino-1-(4-bromophenyl)ethanone (2.4 g, 9.6 mmol), and DMF (40 mL), and stirred at ambient condition for 1 hour. Most of the volatile component was removed in vacuo, and the resulting residue was dissolved in ethyl acetate (150 mL), washed with water and brine, dried over Na2SO4, filtered and concentrated in vacuo. The obtained residue was purified by flash chromatography to provide the desired product as a white foam-like solid (3.5 g, 90%). m/z 432.9, 434.9 (M+Na)+.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08841278B2
Source dataset	uspto-grants-2014_09
ORD ID	ord-5e81a2274b2449808f1990ae934c06b6
Source note	uspto-grants-2014_09