Diisopropylethylamine → 5-chloro-4-(3-(4-ethoxypiperidine-1-carbonyl)-5-fluorobenzyl)phthalazin-1(2H)-one

HRID 1091810Notes

Reaction equation

HRID 1091810 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[C:10]([CH2:12][C:13]1[CH:14]=[C:15]([CH:19]=[C:20]([F:22])[CH:21]=1)[C:16](O)=[O:17])=[N:9][NH:8][C:7]2=[O:23].[CH2:24]([O:26][CH:27]1[CH2:32][CH2:31][NH:30][CH2:29][CH2:28]1)[CH3:25].CCN(C(C)C)C(C)C>CN(C=O)C>[Cl:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[C:10]([CH2:12][C:13]1[CH:21]=[C:20]([F:22])[CH:19]=[C:15]([C:16]([N:30]3[CH2:31][CH2:32][CH:27]([O:26][CH2:24][CH3:25])[CH2:28][CH2:29]3)=[O:17])[CH:14]=1)=[N:9][NH:8][C:7]2=[O:23]

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 115065194-EthoxypiperidineHCID 577917753-((8-Chloro-4-oxo-3,4-dihydrophthalazin-1-yl)methyl)-5-fluorobenzoic acid

Product 1

HCID 577917815-chloro-4-(3-(4-ethoxypiperidine-1-carbonyl)-5-fluorobenzyl)phthalazin-1(2H)-one

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

3-((8-chloro-4-oxo-3,4-dihydrophthalazin-1-yl)methyl)-5-fluorobenzoic acid (128), 4-ethoxypiperidine and 2-(1H-benzo[d][1,2,3]triazol-1-yl)-1,1,3,3-tetramethylisouronium tetrafluoroborate were dissolved in DMF (10 mL), to this was added DIPEA and the reaction was stirred for 1 hour. The solvent was evaporated to dryness and the gum was dissolved in acetonitrile (4 mL) and purified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 19 mm diameter, 100 mm length), using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the desired compound as a white foam (130 mg); 1H NMR (400.132 MHz, CDCl3) δ 1.20 (3H, t), 2.00-1.38 (4H, m), 3.29-3.05 (1H, m), 3.57-3.34 (5H, m), 4.08-3.91 (1H, m), 4.68 (2H, s), 6.90 (1H, d), 6.97-6.94 (2H, m), 7.67 (1H, t), 7.80 (1H, d), 8.50 (1H, dd); NH missing; m/z (LC-MS, ESI+), RT=2.06 (M+H 444).

Workup

  1. customThe solvent was evaporated to dryness
  2. dissolutionthe gum was dissolved in acetonitrile (4 mL)
  3. custompurified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 19 mm diameter, 100 mm length)
  4. additionFractions containing the desired compound
  5. customwere evaporated to dryness

Sources & evidence

ORD record
ord-59e3a1640bed4812a99ffb21efe4a34a
Source dataset
uspto-grants-2012_03
Patent number
US08129380B2

Reaction notes

Loading…