Potassium Hydroxide → 1,1-Dimethylethyl (2S)-4-[(4-amino-3-fluorophenyl)methyl]-2-methyl-1-piperazinecarboxylate

HRID 534745Notes

Reaction equation

HRID 534745 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([CH2:11][N:12]2[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[C@@H:14]([CH3:25])[CH2:13]2)[CH:5]=[CH:6][C:7]=1[N+:8]([O-])=O.NC1C=CC(CN2CCN(C(OC(C)(C)C)=O)[C@@H](C)C2)=CC=1.[OH-].[K+]>C(N(CC)CC)C>[NH2:8][C:7]1[CH:6]=[CH:5][C:4]([CH2:11][N:12]2[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:23])([CH3:22])[CH3:24])=[O:19])[C@@H:14]([CH3:25])[CH2:13]2)=[CH:3][C:2]=1[F:1]

Participants

5

Reactant 3

HCID 14797Potassium HydroxideHCID 59262185HCID 59262185, compoundHCID 592622171,1-Dimethylethyl (2S)-4-[(4-aminophenyl)methyl]-2-methyl-1-piperazinecarboxylate

Product 1

HCID 592622441,1-Dimethylethyl (2S)-4-[(4-amino-3-fluorophenyl)methyl]-2-methyl-1-piperazinecarboxylate

Reagents, catalysts & solvents 1

HCID 8471TriethylamineSolvent

Procedure

The title compound was prepared from 1,1-dimethylethyl (2S)-4-[(3-fluoro-4-nitrophenyl)methyl]-2-methyl-1-piperazinecarboxylate (D62) using a method similar to that described for D2 in Description 2 although the reaction was carried out on an H-Cube™ continuous flow hydrogenator and triethylamine was used in place of solid KOH. δH (CDCl3, 400 MHz) 6.99 (1H, dd), 6.86 (1H, dd), 6.71 (1H, dd), 4.17 (1H, br.s), 3.79 (1H, d), 3.67 (2H, br.s), 3.40 (1H, d), 3.27 (1H, d), 3.09 (1H, td), 2.73 (1H, m), 2.56 (1H, m), 2.08 (1H, dd), 1.96 (1H, m), 1.45 (9H, s), 1.22 (3H, d).

Sources & evidence

ORD record
ord-7886200bd6f0466899485c97a4f10df1
Source dataset
uspto-grants-2014_10
Patent number
US08853218B2

Reaction notes

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