Potassium Carbonate → HCID 22144548, compound

HRID 1824794Notes

Reaction equation

HRID 1824794 reaction equation
Br[C:2]1[C:7]2[N:8]=[C:9]([C:11]3[CH:16]=[CH:15][C:14]([O:17][CH3:18])=[CH:13][CH:12]=3)[S:10][C:6]=2[CH:5]=[C:4]([O:19][CH3:20])[CH:3]=1.[C:21](=O)([O-])[O-].[K+].[K+].CB(O)O>C1(C)C=CC=CC=1.C(OC(=O)C)C.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>[CH3:21][C:2]1[C:7]2[N:8]=[C:9]([C:11]3[CH:16]=[CH:15][C:14]([O:17][CH3:18])=[CH:13][CH:12]=3)[S:10][C:6]=2[CH:5]=[C:4]([O:19][CH3:20])[CH:3]=1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 139377Methylboronic AcidHCID 22144553HCID 22144553, compound

Product 1

HCID 22144548HCID 22144548, compoundYield 77.2%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of 4-bromo-6-methoxy-2-(4-methoxy-phenyl)-benzothiazole (1.0 g, 2.86 mmol) in dry toluene (25 mL) was added potassium carbonate (4.2 g, 30.4 mmol), methylboronic acid (0.92 g, 15.3 mmol) and tetrakis(triphenylphosphine)palladium (0.44 g, 0.38 mmol). The mixture was heated to 100° C. for 24 h, then cooled to room temperature. The mixture was diluted with ethylacetate and washed with water, saturated sodium carbonate and brine. After chromatographic purification gave 4-methyl-6-methoxy-2-(4-methoxy-phenyl)-benzothiazole as a white solid (0.63 g, 77% yield). Mass spec: MH+=286.

Workup

  1. temperaturecooled to room temperature
  2. washwashed with water, saturated sodium carbonate and brine
  3. customAfter chromatographic purification

Sources & evidence

ORD record
ord-ea14e8ca57e14578a8dd4799695fd9ab
Source dataset
uspto-grants-2006_05
Patent number
US07045539B2

Reaction notes

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