Hippuric Acid → 4-[(N-benzoylglycyl)amino]methyl-1-(4-chlorobenzyl)piperidine

HRID 1280992Notes

Reaction equation

[NH2:1][CH2:2][CH:3]1[CH2:8][CH2:7][N:6]([CH2:9][C:10]2[CH:15]=[CH:14][C:13]([Cl:16])=[CH:12][CH:11]=2)[CH2:5][CH2:4]1.[C:17](O)(=[O:28])[CH2:18][NH:19][C:20]([C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)=[O:21].CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.CCN(CC)CC>C(Cl)Cl>[C:20]([NH:19][CH2:18][C:17]([NH:1][CH2:2][CH:3]1[CH2:8][CH2:7][N:6]([CH2:9][C:10]2[CH:11]=[CH:12][C:13]([Cl:16])=[CH:14][CH:15]=2)[CH2:5][CH2:4]1)=[O:28])(=[O:21])[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of 4-(aminomethyl)-1-(4-chlorobenzyl)piperidine (50 mg, 0.21 mmol) in CH2Cl3 (1 mL) was treated with hippuric acid (38 mg, 0.21 mmol), EDCI (48 mg, 0.24 mmol), HOBt (31 mg, 0.23 mmol) and Et3N (38 μL, 0.27 mmol). The reaction mixture was stirred for 16 h at 25° C., diluted with 1 mL of CH2Cl2, washed with 2 N aqueous NaOH solution (2×0.75 mL), dried (MgSO4) and concentrated. Chromatography (SiO2, 6 to 8% CH3OH/CH3Cl2 gradient elution) afforded 4-{(N-benzoylglycyl)amino}methyl-1-(4-chlorobenzyl)piperidine (compound No. 458) which was treated with TFA to give a TFA salt (105 mg, 97%): The purity was determined by RPLC/MS (85%); ESI/MS m/e 400 (M++H, C22H26ClN3O2).

Workup

washwashed with 2 N aqueous NaOH solution (2×0.75 mL)
dry with materialdried (MgSO4)
concentrationconcentrated
washChromatography (SiO2, 6 to 8% CH3OH/CH3Cl2 gradient elution)

Sources & evidence

ORD record: ord-9432f6fd295b4f68b5f87e027377113b
Source dataset: uspto-grants-2002_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06451842B1

Reaction notes

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