Triethylamine → HCID 71201914, compound

Trans-2-phenyl-1-cyclopropanecarboxylic acid IM46 (0.590 g, 3.64 mmol) was dissolved in DMF (15.0 mL). N,N,N′,N′-tetramethyl-O-(7-azabenzotriazol-1-yl)uronium hexafluorophosphate (1.38 g, 3.63 mmol) was added. Triethylamine (1.10 mL, 7.89 mmol) was then added and the mixture was stirred for 15 minutes at room temperature. This mixture was added drop wise to a solution of (S)-1-(6-isopropoxy-pyridin-3-yl)-ethylamine IM24 (0.655 g, 3.63 mmol) dissolved in DMF (15.0 mL) over 2 minutes. The mixture was stirred at room temperature over night. The mixture was evaporated to dryness. The residue was transferred to a silica gel column and eluded with EtOAc/heptanes 1:1 to give Compound 1 as a solid. This solid was dissolved in EtOAc (50 mL) and to this solution was slowly added heptanes (50 mL). The mixture was concentrated to approx. 25 mL in vacuo and this solution was cooled in an ice/water bath. A white precipitate formed. The solids was collected by filtration and dried in vacuo to give the title compound as colorless crystals (0.794 g, 67%). LC-MS (m/z) 325.4 (MH+), tR=1.51 min (method A). 1H NMR (500 MHz, DMSO) δ 8.57-8.50 (m, 1H), 8.06 (br s, 1H), 7.65-7.57 (m, 1H), 7.30-7.24 (m, 2H), 7.20-7.14 (m, 1H), 7.10 (d, J=7.5 Hz, 2H), 6.69 (d, J=8.5 Hz, 1H), 5.25-5.16 (m, 1H), 4.98-4.88 (m, 1H), 2.24-2.15 (m, 1H), 1.94-1.88 (m, 1H), 1.41-1.32 (m, 4H), 1.26 (d, J=6.2 Hz, 6H), 1.20 (ddd, J=8.5, 6.1, 4.1 Hz, 1H). Diastereomeric excess >95% based on 1H NMR.

1. stirringThe mixture was stirred at room temperature over night
2. customThe mixture was evaporated to dryness

ORD record

ord-fd56a29392124c58aaf0af430de64cab

Source dataset

uspto-grants-2013_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08598213B2