Triethylamine → 2-(3,5-Bis-trifluoromethyl-phenyl)-n-methyl-n-[(3s,4r)-4-phenyl-1-((r)-tetrahydro-furan-2-carbonyl)-pyrrolidin-3-yl]-isobutyramide

Participants

Role	Name	HCID	Charge
Reactant	Triethylamine	HCID 8471	—
Reactant	Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate	HCID 151348	—
Reactant	Tetrahydro-2-furoic acid, (+)-	HCID 2734707	—
Reactant	Rac-2-(3,5-bis-trifluoromethyl-phenyl)-n-methyl-n-((3s,4r)-4-phenyl-pyrrolidin-3-yl)-isobutyramide	HCID 59840126	—
Solvent	Tetrahydrofuran	HCID 8028	—
Product	2-(3,5-Bis-trifluoromethyl-phenyl)-n-methyl-n-[(3s,4r)-4-phenyl-1-((r)-tetrahydro-furan-2-carbonyl)-pyrrolidin-3-yl]-isobutyramide	HCID 59840132	28%

Reaction Steps

To a stirred solution of (R)-tetrahydro-furan-2-carboxylic acid (described in Tetrahedron Asymmetry, 2003, 14(10, 1385) (5.0 mg, 0.043 mmol) in THF (2 ml) at RT were added Et3N (12 μl, 0.086 mmol), BOP (25 mg, 0.057 mmol) and rac-2-(3,5-bis-trifluoromethyl-phenyl)-N-methyl-N-((3S,4R)-4-phenyl-pyrrolidin-3-yl)-isobutyramide (Intermediate VII-1) (20 mg, 0.043 mmol). Stirring was continued at 40° C. for 48 hours. Concentration and purification by preparative HPLC afforded 5.8 mg (28%) of the title compound.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US07893062B2
Source dataset	uspto-grants-2011_02
ORD ID	ord-f1ec5d24c5d34d01a7c4b06320decea3
Source note	uspto-grants-2011_02