Tert-butyl 3-(methylamino)propanoate → tert-butyl N-(5-cyano-2-fluorobenzyl)-N-methyl-beta-alaninate
Reaction equation
[C:1]([C:3]1[CH:4]=[CH:5][C:6]([F:11])=[C:7]([CH:10]=1)[CH2:8]Br)#[N:2].[CH3:12][NH:13][CH2:14][CH2:15][C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17]>>[C:1]([C:3]1[CH:4]=[CH:5][C:6]([F:11])=[C:7]([CH:10]=1)[CH2:8][N:13]([CH3:12])[CH2:14][CH2:15][C:16]([O:18][C:19]([CH3:21])([CH3:20])[CH3:22])=[O:17])#[N:2]Participants
3
Procedure
The title compound was prepared following the general procedure 10 starting from 5-cyano-2-fluorobenzylbromide (1.5 g, 7.0 mmol) and tert-butyl N-methyl-beta-alaninate (1.3 g, 8.4 mmol, prepared as described in Biorg. Med. Chem. (11) 2003, 3083-3099). It was isolated as a pale yellow oil (1.9 g, 92%). 1H NMR (CDCl3, 300 MHz) δ 7.79 (dd, J=6.7, 2.1 Hz, 1H), 7.57-7.52 (m, 1H), 7.11 (m, 1H), 3.57 (s, 2H), 2.74 (t, J=7.1 Hz, 2H), 2.43 (t, J=7.1 Hz, 2H), 2.22 (s, 3H), 1.45 (s, 9H). LC/MS (Method B): 293.2 (M+H)+. HPLC (Method A) Rt 2.44 min (Purity: 86.4%).
Sources & evidence
- ORD record
- ord-147cc3b5c75049809184696e890403c7
- Source dataset
- uspto-grants-2014_08
- Patent number
- US08802704B2
Reaction notes
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