Benzo[b]furan-2-boronic acid → 2-[(4-Benzofuran-2-yl-benzyl)-(4-methoxy-2,3,6-trimethyl-benzenesulfonyl)-amino]-3-phenyl-propionic acid methyl ester

HRID 2179927Notes

Reaction equation

HRID 2179927 reaction equation
[CH3:1][O:2][C:3](=[O:35])[CH:4]([N:12]([CH2:27][C:28]1[CH:33]=[CH:32][C:31](I)=[CH:30][CH:29]=1)[S:13]([C:16]1[C:21]([CH3:22])=[CH:20][C:19]([O:23][CH3:24])=[C:18]([CH3:25])[C:17]=1[CH3:26])(=[O:15])=[O:14])[CH2:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1.[O:36]1[C:40]2[CH:41]=[CH:42][CH:43]=[CH:44][C:39]=2[CH:38]=[C:37]1B(O)O>COCCOC.C([O-])([O-])=O.[Na+].[Na+].C(OCC)(=O)C.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:1][O:2][C:3](=[O:35])[CH:4]([N:12]([CH:27]([C:37]1[O:36][C:40]2=[CH:41][CH:42]=[CH:43][C:44]2=[CH:39][CH:38]=1)[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)[S:13]([C:16]1[C:21]([CH3:22])=[CH:20][C:19]([O:23][CH3:24])=[C:18]([CH3:25])[C:17]=1[CH3:26])(=[O:15])=[O:14])[CH2:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1

Participants

8

Reactant 2

HCID 2776266Benzo[b]furan-2-boronic acidHCID 865904232-[(4-Iodo-benzyl)-(4-methoxy-2,3,6-trimethyl-benzenesulfonyl)-amino]-3-phenyl-propionic acid methyl ester

Product 1

HCID 865904242-[(4-Benzofuran-2-yl-benzyl)-(4-methoxy-2,3,6-trimethyl-benzenesulfonyl)-amino]-3-phenyl-propionic acid methyl esterYield 100%

Reagents, catalysts & solvents 5

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolventHCID 10340Sodium CarbonateSolvent

Conditions

Temperature
65 °C

Procedure

To a degassed solution of 2-[(4-Iodo-benzyl)-(4-methoxy-2,3,6-trimethyl-benzenesulfonyl)-amino]-3-phenyl-propionic acid methyl ester (40 mg, 0.068 mmol) and benzofuran-2-boronic acid (20 mg, 0.124 mmol) in a mixture of DME (3 mL) and 2M aqueous Na2CO3 (1.5 mL), Pd(PPh3)4 (4 mg) was added and the reaction mixture was stirred at 65° C. for 2 h under a N2 atmosphere. The reaction mixture was diluted with ethyl acetate and water. The organic layer was separated, dried (Na2SO4), concentrated. The residue was purified by column chromatography using ethyl acetate and hexane (1:9) to obtain 2-[(4-Benzofuran-2-yl-benzyl)-(4-methoxy-2,3,6-trimethyl-benzenesulfonyl)-amino]-3-phenyl-propionic acid methyl ester (39 mg, 100%) as a thick syrup. 1H NMR (af-2783) (CDCl3, 400 MHz): δ7.2 (d, 2H), 7.62 (d, 1H), 7.55 (d, 1H), 7.30-7.15 (m, 7H), 7.12 (d, 2H), 6.96 (s, 1H), 6.51 (s, 1H), 4.72 (m, 3H), 3.80, 3.40 (2s, 6H), 3.28 (dd, 1H), 3.02 (dd, 1H), 2.71, 2.58, 2.12 (3s, 9H).

Workup

  1. additionwas added
  2. customThe organic layer was separated
  3. dry with materialdried (Na2SO4)
  4. concentrationconcentrated
  5. customThe residue was purified by column chromatography

Sources & evidence

ORD record
ord-b2286374b93542ff93f200738149fa43
Source dataset
uspto-grants-2005_05
Patent number
US06887877B2

Reaction notes

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