N-(tert-butoxycarbonyl)glycine → HCID 57947374, compound

Participants

Reaction Steps

To a solution of (S)-3-benzyloxycarbonylamino-2-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)propyl 6-fluoroisoquinolin-3-ylcarbamate (1.3 g, 2.13 mmol) in CH3CN (20.0 mL) was added TMSI (0.35 mL, 2.56 mmol). The mixture was stirred for 15 min. MeOH (20.0 mL) was added and stirring continued another 15 min. The mixture was concentrated and partitioned between diethyl ether (30 mL) and HCl (2 N, 20 mL). The aqueous layer was separated, adjusted to pH 9, extracted with EtOAc (200 mL×2). The combined organic layers were washed brine, dried over Na2SO4, filtered, and concentrated under reduced pressure to give an crude oil, which was dissolved in DMF (6.0 mL). To this DMF solution were added Boc-Gly-OH (0.36 g, 2.03 mmol) and HBTU (0.77 g, 2.03 mmol). The mixture was stirred for 1 h. The crude was filtered and purified on RP-HPLC using a mixture of acetonitrile and H2O to give (S)-3-(2-tert-butoxycarbonylaminoacetamido)-2-(3-(2-chloro-3-fluorobenzyl)-1-methylureido)propyl 6-fluoroisoquinolin-3-ylcarbamate (0.91 g, 78%). LRMS (M+H+) m/z 635.2.

Provenance & Evidence