Dimethylformamide → 1-{[2-(Hex-5-enyl-methyl-carbamoyl)-4-hydroxy-cyclopentanecarbonyl]-amino}-2-vinyl-cyclopropanecarboxylic acid ethyl ester

Participants

Role	Name	HCID	Charge
Reactant	Dimethylformamide	HCID 6228	—
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)	HCID 9886157	—
Reactant	2-(1-Ethoxycarbonyl-2-vinyl-cyclopropylcarbamoyl)-4-hydroxy-cyclopentane carboxylic acid diisopropylethylamine salt	HCID 66870271	—
Solvent	Dichloromethane	HCID 6344	—
Product	1-{[2-(Hex-5-enyl-methyl-carbamoyl)-4-hydroxy-cyclopentanecarbonyl]-amino}-2-vinyl-cyclopropanecarboxylic acid ethyl ester	HCID 66870607	74%

Reaction Steps

The crude compound 4 (5.5 mmol) was dissolved in DCM (50 ml) and DMF (14 ml) followed by addition of HATU (2.09 g, 5.5 mmol), 5 (678 mg, 6.0 mmol) and DIPEA (3.08 ml, 17.5 mmol) at room temperature. The reaction was stirred at ambient temperature for 1 h. LC/MS analysis showed complete conversion and the reaction mixture was concentrated in vacuo. The residue was re-dissolved in ethyl acetate (100 ml) and the organic layer washed with 0.1 M HCl (aqueous), K2CO3 (aqueous) and brine, dried (MgSO4) and filtered. Evaporation of the solvent in vacuo gave an oil which was purified by flash chromatography (Silica, ethyl acetate/methanol) to afford the target compound 6 (1.65 g, 74%). TLC (Silica): methanol/ethyl acetate 5:95, Rf=0.5; LC/MS (Method A): tR=3.44 min, >95%, m/z (ESI+)=407 (MH+).

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US07666834B2
Source dataset	uspto-grants-2010_02
ORD ID	ord-5c6064d1b3e641ae87222c4d3e7f7cf8
Source note	uspto-grants-2010_02