Potassium Phosphate, Tribasic → Methyl 4-(4-(dibutylcarbamoyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-2-yl)-3-(1,2,3,4-tetrahydroisoquinoline-2-carbonyl)benzoate

HRID 528995Notes

Reaction equation

HRID 528995 reaction equation
CC1(C)COB([C:8]2[CH:17]=[CH:16][C:11]([C:12]([O:14][CH3:15])=[O:13])=[CH:10][C:9]=2[C:18]([N:20]2[CH2:29][CH2:28][C:27]3[C:22](=[CH:23][CH:24]=[CH:25][CH:26]=3)[CH2:21]2)=[O:19])OC1.Br[C:32]1[N:33]([CH2:48][O:49][CH2:50][CH2:51][Si:52]([CH3:55])([CH3:54])[CH3:53])[CH:34]=[C:35]([C:37]([N:39]([CH2:44][CH2:45][CH2:46][CH3:47])[CH2:40][CH2:41][CH2:42][CH3:43])=[O:38])[N:36]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>O1CCOCC1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH2:40]([N:39]([CH2:44][CH2:45][CH2:46][CH3:47])[C:37]([C:35]1[N:36]=[C:32]([C:8]2[CH:17]=[CH:16][C:11]([C:12]([O:14][CH3:15])=[O:13])=[CH:10][C:9]=2[C:18]([N:20]2[CH2:29][CH2:28][C:27]3[C:22](=[CH:23][CH:24]=[CH:25][CH:26]=3)[CH2:21]2)=[O:19])[N:33]([CH2:48][O:49][CH2:50][CH2:51][Si:52]([CH3:55])([CH3:54])[CH3:53])[CH:34]=1)=[O:38])[CH2:41][CH2:42][CH3:43]

Participants

6

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 71060775Methyl 4-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-3-(1,2,3,4-tetrahydroisoquinoline-2-carbonyl)benzoateHCID 710622212-Bromo-N,N-dibutyl-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazole-4-carboxamide

Product 1

HCID 71062252Methyl 4-(4-(dibutylcarbamoyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazol-2-yl)-3-(1,2,3,4-tetrahydroisoquinoline-2-carbonyl)benzoateYield 58.9%

Reagents, catalysts & solvents 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of methyl 4-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-3-(1,2,3,4-tetrahydroisoquinoline-2-carbonyl)benzoate (2.0 g, 5.05 mmol) in dioxane (40 mL) was added Pd(dppf)2Cl2 (77 mg, 0.10 mmol), 2-bromo-N,N-dibutyl-1-((2-(trimethylsilyl) ethoxy)methyl)-1H-imidazole-4-carboxamide (910 mg, 2.10 mmol) and K3PO4 (1.34 g, 6.31 mmol). The reaction mixture was degassed for 30 min, heated at 100° C. for 16 h and concentrated in vacuo. The resulting residue was dissolved in EtOAc and washed with water, dried over Na2SO4, and concentrated to give the crude product. The crude material was purified by flash chromatography (gradient from 0% to 80%, EtOAc/hexanes) to provide the title compound (800 mg, 57%). 1H NMR (CD3OD, 1:1 mixture of amide rotamers) δ 8.23 (dd, J=6.4, 1.6 Hz, 1H), 8.13-8.12 (m, 1H), 7.98 (dd, J=14.4, 8.0 Hz, 1H), 7.78 (s, 0.5H), 7.67 (s, 0.5H), 7.24-7.12 (m, 3.5H), 6.93 (d, J=7.2 Hz, 0.5H), 5.39 (s, 1H), 5.30 (s, 1H), 4.85-4.75 (m, 2H), 4.58-4.35 (m, 1H), 3.99 (s, 3H), 3.71-3.62 (m, 3H), 3.56 (t, J=6.0 Hz, 2H), 3.45-3.36 (m, 2H), 2.90-2.80 (m, 2H), 1.65-1.31 (m, 8H), 1.00-0.91 (m, 5H), 0.80-0.73 (m, 3H), 0.04 (s, 4.5H), 0.02 (s, 4.5H); MS (ESI−) m/z 646.2 (M−H)−.

Workup

  1. customThe reaction mixture was degassed for 30 min
  2. concentrationconcentrated in vacuo
  3. dissolutionThe resulting residue was dissolved in EtOAc
  4. washwashed with water
  5. dry with materialdried over Na2SO4
  6. concentrationconcentrated
  7. customto give the crude product
  8. customThe crude material was purified by flash chromatography (gradient from 0% to 80%, EtOAc/hexanes)

Sources & evidence

ORD record
ord-6c3f243ddccb4445803eed3e837a176d
Source dataset
uspto-grants-2016_05
Patent number
US09346795B2

Reaction notes

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