4-Quinolinecarboxylic acid → N-[[1-[(4-methoxyphenyl)methyl]cyclopentyl]carbonyl]-4-[(4-quinolinylcarbonyl)amino]-L-phenylalanine

HRID 1282599Notes

Reaction equation

HRID 1282599 reaction equation
C[O:2][C:3](=[O:30])[C@H:4]([CH2:22][C:23]1[CH:28]=[CH:27][C:26]([NH2:29])=[CH:25][CH:24]=1)[NH:5][C:6]([C:8]1([CH2:13][C:14]2[CH:19]=[CH:18][C:17]([O:20][CH3:21])=[CH:16][CH:15]=2)[CH2:12][CH2:11][CH2:10][CH2:9]1)=[O:7].[N:31]1[C:40]2[C:35](=[CH:36][CH:37]=[CH:38][CH:39]=2)[C:34]([C:41](O)=[O:42])=[CH:33][CH:32]=1.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N(C(C)C)CC)(C)C.[OH-].[Na+]>CN(C=O)C.C(OCC)(=O)C.CCOCC.CO>[CH3:21][O:20][C:17]1[CH:16]=[CH:15][C:14]([CH2:13][C:8]2([C:6]([NH:5][C@H:4]([C:3]([OH:2])=[O:30])[CH2:22][C:23]3[CH:28]=[CH:27][C:26]([NH:29][C:41]([C:34]4[C:35]5[C:40](=[CH:39][CH:38]=[CH:37][CH:36]=5)[N:31]=[CH:32][CH:33]=4)=[O:42])=[CH:25][CH:24]=3)=[O:7])[CH2:9][CH2:10][CH2:11][CH2:12]2)=[CH:19][CH:18]=1

Participants

10

Reactant 5

HCID 102434-Quinolinecarboxylic acidHCID 14798Sodium HydroxideHCID 81531DiisopropylethylamineHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 544852054-Amino-N-[[1[(4-methoxyphenyl)methyl]cyclopentyl]carbonyl]-L-phenylalanine methyl ester

Product 1

HCID 11157112N-[[1-[(4-methoxyphenyl)methyl]cyclopentyl]carbonyl]-4-[(4-quinolinylcarbonyl)amino]-L-phenylalanineYield 55.1%

Reagents, catalysts & solvents 4

HCID 887MethanolSolventHCID 3283Diethyl EtherSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of 4-amino-N-[[1-[(4-methoxyphenyl)methyl]cyclopentyl]carbonyl]-L-phenylalanine methyl ester (30.7 mg, 0.075 mmol), quinoline-4-carboxylic acid (17 mg, 0.10 mmol), and HBTU (38 mg, 0.10 mmol) in 1 mL of DMF was treated with diisopropylethylamine (30 μL, 0.17 mmol). The mixture was stirred over night and was diluted with 15 mL of ethyl acetate and 10 mL of ether and was washed with water (2×10 mL), saturated NaHCO3 (1×10 mL) and was dried (MgSO4). Concentration gave 42 mg which was dissolved in 3 mL of methanol. Sodium hydroxide (0.10 mL, 4 N, 0.4 mmol) was added and the mixture was stirred for 2 hours. The excess base was quenched by addition of acetic acid (0.1 mL), the solution was filtered through a 0.2μ nylon filter and the filtrate was purified by RP-HPLC on a 4×30 cm Rainin C-18 column using a gradient of 5 to 95% acetonitrile:water containing 0.75% trifluoroacetic acid at a flow of 49 mL/min over 30 min. The peak eluting at 74% acetonitrile was concentrated and lyophilized to give N-[[1-[(4-methoxyphenyl)methyl]cyclopentyl]carbonyl]-4-[(4-quinolinylcarbonyl)amino]-L-phenylalanine (22.8 mg), HR-FAB-MS: obs. mass 552.2482. Calcd. mass 552.2498 (M+H). The peak eluting at 82.6% acetonitrile was recovered N-[[1-[(4-methoxyphenyl)methyl]cyclopentylcarbonyl]-4-[(4-quinolinylcarbonyl)amino]-L-phenylalanine methyl ester (11.2 mg), HR-FAB-MS: obs. mass 566.2675. Calcd. mass 566.2655 (M+H).

Workup

  1. washwas washed with water (2×10 mL), saturated NaHCO3 (1×10 mL)
  2. dry with materialwas dried (MgSO4)
  3. concentrationConcentration
  4. customgave 42 mg which
  5. stirringthe mixture was stirred for 2 hours
  6. customThe excess base was quenched by addition of acetic acid (0.1 mL)
  7. filtrationthe solution was filtered through a 0.2μ nylon
  8. filtrationfilter
  9. customthe filtrate was purified by RP-HPLC on a 4×30 cm Rainin C-18 column
  10. washThe peak eluting at 74% acetonitrile
  11. concentrationwas concentrated

Sources & evidence

ORD record
ord-11d58fe42e77476f98d7c996fad8f5bf
Source dataset
uspto-grants-2002_09
Patent number
US06455550B1

Reaction notes

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