Phenylboronic Acid → (7R,8R,9R)-10-acetyl-3,9-diphenyl-7-(2-methoxyethoxy)-2-methyl-8-pivaloyloxy-7,8,9,10-tetrahydroimidazo[1,2-h][1,7]naphthyridine

HRID 723408Notes

Reaction equation

HRID 723408 reaction equation
[C:1]([N:4]1[C:13]2[C:12]3=[N:14][C:15]([CH3:18])=[C:16](Br)[N:11]3[CH:10]=[CH:9][C:8]=2[C@@H:7]([O:19][CH2:20][CH2:21][O:22][CH3:23])[C@H:6]([O:24][C:25](=[O:30])[C:26]([CH3:29])([CH3:28])[CH3:27])[C@H:5]1[C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)(=[O:3])[CH3:2].[C:37]1(B(O)O)[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1.[F-].[K+].P(C(C)(C)C)(C(C)(C)C)C(C)(C)C>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C1COCC1>[C:1]([N:4]1[C:13]2[C:12]3=[N:14][C:15]([CH3:18])=[C:16]([C:37]4[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=4)[N:11]3[CH:10]=[CH:9][C:8]=2[C@@H:7]([O:19][CH2:20][CH2:21][O:22][CH3:23])[C@H:6]([O:24][C:25](=[O:30])[C:26]([CH3:29])([CH3:28])[CH3:27])[C@H:5]1[C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)(=[O:3])[CH3:2]

Participants

7

Reactant 4

HCID 66827Phenylboronic AcidHCID 83681Tris(1,1-dimethylethyl)phosphineHCID 522689Potassium FluorideHCID 69586421HCID 69586421, compound

Product 1

HCID 69586312(7R,8R,9R)-10-acetyl-3,9-diphenyl-7-(2-methoxyethoxy)-2-methyl-8-pivaloyloxy-7,8,9,10-tetrahydroimidazo[1,2-h][1,7]naphthyridine

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
25 °C

Procedure

2.61 g (4.67 mmol) (7R,8R,9R)-10-acetyl-3-bromo-7-(2-methoxyethoxy)-2-methyl-9-phenyl-8-pivaloyloxy-7.8.9.10-tetrahydroimidazo[1.2-h][1.7]naphthyridine, 0.63 g (5.14 mmol) phenylboronic acid, 0.89 g (15.4 mmol) KF (spray-dried), 0.14 g (0.15 mmol) Pd2(dba)3, 0.07g (0.36 mmol/10wt % solution in hexane)P(t-Bu)3 and THF (30 ml) are added to a Schlenk tube under argon. Afterwards the Schlenk tube is evacuated and refilled with argon in a freeze-pump-thaw cycles technique three times. The reaction mixture is stirred under argon for 2 d at 25° C. Subsequently the reaction is diluted by adding of ethyl acetate and then filtrated through silica gel. The concentrated crude product is purified by column chromatography (diethyl ether/petrol ether: 6/4) to give 1.80 g (3.24 mmol/70%) of the title compound as an amorphous colourless solid. 1H-NMR (200 MHz, [D6] DMSO): δ=1.20 (s, 9H), 2.20(s, 3H), 2.43(s, 3H), 3.30 (s, 3H), 3.40–3.57(m, 2H), 3.88 (t, 2H), 4.64 (d, 1H), 5.35 (t, 1H), 5.83(d, 1H), 7.00(d, 1H), 7.10–7.30(m, 5H), 7.41–7.68 (m, 5H), 8.24(d, 1H).

Workup

  1. customAfterwards the Schlenk tube is evacuated
  2. additionrefilled with argon in a freeze-pump-thaw cycles technique three times
  3. additionSubsequently the reaction is diluted
  4. additionby adding of ethyl acetate
  5. filtrationfiltrated through silica gel
  6. concentrationThe concentrated crude product
  7. customis purified by column chromatography (diethyl ether/petrol ether: 6/4)

Sources & evidence

ORD record
ord-c428b6b6c48347bc98f348eb0deb5cc7
Source dataset
uspto-grants-2006_11
Patent number
US07141567B2

Reaction notes

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