Triphenylphosphine → (S)-N-(5-((1-ethyl-3-(trifluoromethyl)-1H-pyrazol-5-yl)methyl)-2,3-dihydro-1H-inden-2-yl)propane-2-sulfonamide

Temperature

100 °C

Tris(dibenzylideneacetone)dipalladium (0) chloroform adduct (0.014 mmol, 14.17 mg) was dissolved in THF (1 mL) and triphenylphosphine (0.027 mmol, 7.18 mg) added. The mixture was stirred at room temperature for 30 m before addition of N-bromosuccinimide (0.027 mmol, 4.87 mg). Stirring was continued for a further 30 min before addition of (S)—N-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-inden-2-yl)propane-2-sulfonamide (0.137 mmol, 50 mg) in 500 μL THF, 5-(chloromethyl)-1-ethyl-3-(trifluoromethyl)-1H-pyrazole (0.137 mmol, 29.1 mg) in 500 μL THF and 2M Na2CO3 solution (2 mL). The mixture was heated to 100° C. for 10 min in the microwave before the mixture was filtered through a filter tip and concentrated to dryness. The residue was partitioned between DCM/Water and the organic phase collected and dried using a hydrophobic filter. TLC (1:1 EtOAc/Heptane) shows complex mix (see in process)—difficulty to assign product spot. The residue was purified using silica chromatography (20% EtOAc/Heptane) to give a residue which was further purified on basic HPLC to give the desired compound (3.6 mg, 8.7 μmol, 6.3%). MS (ESI): m/z [M−H]− 414.4.

1. filtrationwas filtered through a filter tip
2. concentrationconcentrated to dryness
3. customThe residue was partitioned between DCM/Water
4. customthe organic phase collected
5. customdried
6. additionmix (
7. customThe residue was purified
8. customto give a residue which
9. customwas further purified on basic HPLC

ORD record

ord-9ab4da0f9e864b2b9b46c206073c9c7d

Source dataset

uspto-grants-2013_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08536214B2