Potassium Carbonate → (S)-ethyl 2-tert-butoxy-2-(7-(4-chlorophenyl)-2-(1,3-dimethyl-1H-indazol-6-yl)-5-methylbenzo[d]thiazol-6-yl)acetate

HRID 879406Notes

Reaction equation

HRID 879406 reaction equation
Br[C:2]1[S:3][C:4]2[C:10]([C:11]3[CH:16]=[CH:15][C:14]([Cl:17])=[CH:13][CH:12]=3)=[C:9]([C@H:18]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])[C:19]([O:21][CH2:22][CH3:23])=[O:20])[C:8]([CH3:29])=[CH:7][C:5]=2[N:6]=1.[CH3:30][N:31]1[C:39]2[C:34](=[CH:35][CH:36]=[C:37](B(O)O)[CH:38]=2)[C:33]([CH3:43])=[N:32]1.C([O-])([O-])=O.[K+].[K+].O1CCOCC1>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.O>[C:25]([O:24][C@@H:18]([C:9]1[C:8]([CH3:29])=[CH:7][C:5]2[N:6]=[C:2]([C:37]3[CH:38]=[C:39]4[C:34]([C:33]([CH3:43])=[N:32][N:31]4[CH3:30])=[CH:35][CH:36]=3)[S:3][C:4]=2[C:10]=1[C:11]1[CH:16]=[CH:15][C:14]([Cl:17])=[CH:13][CH:12]=1)[C:19]([O:21][CH2:22][CH3:23])=[O:20])([CH3:28])([CH3:27])[CH3:26]

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 312751,4-DioxaneHCID 44119494(1,3-Dimethyl-1H-indazol-6-YL)boronic acidHCID 86700141(S)-ethyl 2-(2-bromo-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyacetate

Product 1

HCID 86700213(S)-ethyl 2-tert-butoxy-2-(7-(4-chlorophenyl)-2-(1,3-dimethyl-1H-indazol-6-yl)-5-methylbenzo[d]thiazol-6-yl)acetate

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent

Conditions

Temperature
100 °C

Procedure

To a vial flushed with argon was added (S)-ethyl 2-(2-bromo-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyacetate (100 mg, 0.202 mmol), 1,3-dimethyl-1H-indazol-6-ylboronic acid (76 mg, 0.4 mmol), Pd(PPh3)4 (23 mg, 20 μmol), and K2CO3 (83 mg, 0.6 mmol). De-gassed dioxane (1.6 mL) and water (0.4 mL) were then added, and the reaction was heated to 100° C. for 1 h. After cooling to 23° C., the reaction was filtered over a plug of Celite, concentrated, and purified by column chromatography (gradient 0 to 30% EtOAc in hexanes) to give the product. LCMS-ESI+: calc'd for C31H33ClN3O3S: 562.2 (M+H+); Found: 562.3 (M+H+).

Workup

  1. customTo a vial flushed with argon
  2. temperatureAfter cooling to 23° C.
  3. filtrationthe reaction was filtered over a plug of Celite
  4. concentrationconcentrated
  5. custompurified by column chromatography (gradient 0 to 30% EtOAc in hexanes)
  6. customto give the product

Sources & evidence

ORD record
ord-12afc17ef7344aa08603edacdef7fed9
Source dataset
uspto-grants-2015_03
Patent number
US08987250B2

Reaction notes

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