Triethylamine → 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole-2-carbonitrile

HRID 888912Notes

Reaction equation

[CH3:1][C:2]1([CH3:9])[C:6]([CH3:8])([CH3:7])[O:5][BH:4][O:3]1.Br[C:11]1[CH:19]=[CH:18][CH:17]=[C:16]2[C:12]=1[CH:13]=[C:14]([C:20]#[N:21])[NH:15]2.C(N(CC)CC)C.C1(P(C2CCCCC2)C2C=CC=CC=2C2C=CC=CC=2)CCCCC1>O1CCOCC1.C(Cl)Cl.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH3:1][C:2]1([CH3:9])[C:6]([CH3:8])([CH3:7])[O:5][B:4]([C:11]2[CH:19]=[CH:18][CH:17]=[C:16]3[C:12]=2[CH:13]=[C:14]([C:20]#[N:21])[NH:15]3)[O:3]1

Participants

Conditions

Temperature: 80 °C

Procedure

4,4,5,5-Tetramethyl-[1,3,2]dioxaborolane (2.1 mL, 14.5 mmol) was added drop-wise to a mixture of 4-bromo-1H-indole-2-carbonitrile (1.27 g, 5.8 mmol), palladium acetate (33 mg, 0.145 mmol), triethylamine (1.21 mL, 8.7 mmol) and 2-(dicyclohexylphosphino)biphenyl (203 mg, 0.58 mmol) in dioxane at 80° C. The reaction mixture was stirred at 80° C. for 5 h then allowed to stand at RT overnight. The reaction mixture was diluted with DCM and washed with water, then the organic layer was isolated, dried (MgSO4) then concentrated in vacuo. The resultant crude material was purified by column chromatography to afford the title compound as a brown solid (1.02 g, 66%).

Workup

waitto stand at RT overnight
washwashed with water
customthe organic layer was isolated
dry with materialdried (MgSO4)
concentrationthen concentrated in vacuo
customThe resultant crude material was purified by column chromatography

Sources & evidence

ORD record: ord-6550cbdd2666412183585a2d7dc4063b
Source dataset: uspto-grants-2012_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08252792B2

Reaction notes

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