1-Methylpiperazine → 3-{[(Benzyloxy)carbonyl]amino}-7-(4-methylpiperazin-1-yl)quinoline-2-carboxylic acid

HRID 924460Notes

Reaction equation

[CH2:1]([O:8][C:9]([NH:11][C:12]1[C:13]([C:23]([O:25]CC)=[O:24])=[N:14][C:15]2[C:20]([CH:21]=1)=[CH:19][CH:18]=[C:17](Br)[CH:16]=2)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:28][N:29]1[CH2:34][CH2:33][NH:32][CH2:31][CH2:30]1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C(OC(C)C)=CC=CC=2OC(C)C)CCCCC1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>C(O)(C)(C)C.CC([O-])=O.CC([O-])=O.[Pd+2]>[CH2:1]([O:8][C:9]([NH:11][C:12]1[C:13]([C:23]([OH:25])=[O:24])=[N:14][C:15]2[C:20]([CH:21]=1)=[CH:19][CH:18]=[C:17]([N:32]1[CH2:33][CH2:34][N:29]([CH3:28])[CH2:30][CH2:31]1)[CH:16]=2)=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of ethyl 3-{[(benzyloxy)carbonyl]amino}-7-bromoquinoline-2-carboxylate (300 mg, 0.7 mmol), 1-methylpiperazine (200 mg, 2 mmol), Pd(OAc)2 (20 mg), dicyclohexyl(2′,6′-diisopropoxybiphenyl-2-yl)phosphine (49 mg, 0.10 mmol), and K3PO4 (580 mg, 2.8 mmol) in tert-butyl alcohol (10 mL) was purged with N2 prior and then heated at 100° C. in a sealed vial for 2 h. The mixture was allowed to cool, diluted with EtOAc, and then filtered through a diatomaceous earth plug. The filtrate was concentrated under reduced pressure. To the resulting residue, 10 mL of dioxane and 4 mL of 2.5 M NaOH were added.

Workup

customwas purged with N2
temperatureto cool
additiondiluted with EtOAc
filtrationfiltered through a diatomaceous earth plug
concentrationThe filtrate was concentrated under reduced pressure
additionTo the resulting residue, 10 mL of dioxane and 4 mL of 2.5 M NaOH were added

Sources & evidence

ORD record: ord-1689f88c606d4e27b3ed67ca12a49fb3
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09278950B2

Reaction notes

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