Benzo(B)Thiophene-2-Boronic Acid → HCID 20775778, compound

HRID 2193935Notes

Reaction equation

HRID 2193935 reaction equation
[C:1]([O:5][C:6]([C:8]1[S:9][C:10](Br)=[CH:11][C:12]=1[NH:13][S:14]([C:17]1[C:18]([CH3:23])=[CH:19][CH:20]=[CH:21][CH:22]=1)(=[O:16])=[O:15])=[O:7])([CH3:4])([CH3:3])[CH3:2].[S:25]1[C:29]2[CH:30]=[CH:31][CH:32]=[CH:33][C:28]=2[CH:27]=[C:26]1B(O)O.C([O-])([O-])=O.[Na+].[Na+]>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>[C:1]([O:5][C:6]([C:8]1[S:9][C:10]([C:26]2[S:25][C:29]3[CH:30]=[CH:31][CH:32]=[CH:33][C:28]=3[CH:27]=2)=[CH:11][C:12]=1[NH:13][S:14]([C:17]1[C:18]([CH3:23])=[CH:19][CH:20]=[CH:21][CH:22]=1)(=[O:16])=[O:15])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 2359Benzo(B)Thiophene-2-Boronic AcidHCID 10340Sodium CarbonateHCID 20775779HCID 20775779, compound

Product 1

HCID 20775778HCID 20775778, compoundYield 55.6%

Reagents, catalysts & solvents 1

HCID 178418397HCID 178418397, compoundCatalyst

Procedure

Suzuki coupling of 5-Bromo-3-(toluene-2-sulfonylamino)-thiophene-2-carboxylic acid tert-butyl ester (43 mg, 0.1 mmol) and benzothiophene-2-boronic acid (53.4 mg, 0.3 mmol) was carried out using Pd(PPh3)4 and Na2CO3 (as described in example 2) resulted in 5-Benzo[b]thiophen-2-yl-3-(toluene-2-sulfonylamino)-thiophene-2-carboxylic acid tert-butyl ester (27 mg, 55% yield). 1H NMR (CDCl3, 400 MHz) 9.92 (s, 1H), 8.07 (d, J=7.8 Hz, 1H), 7.79-7.71 (m, 2H), 7.45-7.24 (m, 7H), 2.7 (s, 3H), 1.56 (s, 9H).

Sources & evidence

ORD record
ord-48e9ba362b5c41d9b21b6ef52602c8ef
Source dataset
uspto-grants-2012_12
Patent number
US08329924B2

Reaction notes

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