Diisopropylethylamine → (S)-2-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)-5-(1,3-dioxoisoindolin-2-yl)pentyl 5-chloropyridin-2-ylcarbamate

Participants

Reaction Conditions

Reaction Steps

To a solution of (S)-3-(2-chloro-3-fluorobenzyl)-1-(5-(1,3-dioxoisoindolin-2-yl)-1-hydroxypentan-2-yl)-1-methylurea (480 mg, 1.07 mmol), 5-chloropicolinic acid (339 mg, 2.15 mmol), and DIEA (0.36 mL, 2.15 mmol) in toluene (10 mL) was added DPPA (0.46 mL, 2.15 mmol). The reaction mixture was heated to 100° C. for 2 h and concentrated to dryness. The residue was purified on RP-HPLC using a mixture of acetonitrile and water to give (S)-2-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)-5-(1,3-dioxoisoindolin-2-yl)pentyl 5-chloropyridin-2-ylcarbamate (280 mg, 80% pure). LRMS (M+H+) m/z 602.2.

Provenance & Evidence