Lithium Hexamethyldisilazide → HCID 59548358, compound

Participants

Reaction Steps

A solution of 4-(2-chloro-5-fluoropyridin-3-yl)-6-methyl-1,3,5-triazin-2-amine (100 mg, 0.417 mmol) and 5-fluoro-6-methoxypyridin-3-amine (120 mg, 0.844 mmol) (Anichem, NJ, USA) in THF (2.0 mL) was cooled in an ice bath under nitrogen. A THF solution of LiHMDS (1 M in THF, 2500 μL, 2.500 mmol) was added dropwise. After 5 min, the cooling bath was removed. After a total of 22 min, HCl (5 N, 0.5 mL) was added. After 5 min, EtOAc (10 mL) and saturated NH4Cl (10 mL) were added. The organic layer was washed with water (2×5 mL). The combined aqueous layers were extracted with EtOAc (2×5 mL). The combined organic layers were dried over Na2SO4 and concentrated. The resulting residue was suspended in MeOH (5 mL) and filtered. The solid was washed with MeOH (2×2 mL), DCM (3×3 mL) and EtOAc (3×3 mL) to give the first batch of product as a brown solid. The combined washings were concentrated and purified on silica using 0-3% MeOH in DCM. The dark blue fraction contained the desired product (m/z 346) as a second batch. The combined product batches was suspended in ether (4 mL) and filtered to give the final product as a green solid (60 mg). LCMS (ES, pos.): calcd for C15H13F2N7O: 345.1. found: 346.2 (M+H)−. 1H NMR (400 MHz, d6-DMSO) δ 11.78 (s, 1H); 8.56 (dd, J=9.78, 2.93 Hz, 1H); 8.38 (br. s., 2H); 8.28 (dd, J=12.81, 1.86 Hz, 1H); 7.97 (br. s., 1H); 7.84 (br. s., 1H); 3.93 (s, 3H); 2.44 (s, 3H). 19F NMR (377 MHz, d6-DMSO) δ −140.84 (s, 1 F); −139.70 (s, 1 F).

Provenance & Evidence