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

HRID 879380Notes

Reaction equation

HRID 879380 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]([Sn](CCCC)(CCCC)CCCC)[CH:38]=2)[C:33](=[O:53])[N:32]1[CH3:54].[Li+].[Cl-]>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.[Cu]I>[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](=[O:53])[N:32]([CH3:54])[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 3

HCID 433294Lithium ChlorideHCID 86700141(S)-ethyl 2-(2-bromo-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyacetateHCID 867001751,2-dimethyl-6-(tributylstannyl)-1H-indazol-3(2H)-one

Product 1

HCID 86700190(S)-ethyl 2-tert-butoxy-2-(7-(4-chlorophenyl)-2-(1,2-dimethyl-3-oxo-2,3-dihydro-1H-indazol-6-yl)-5-methylbenzo[d]thiazol-6-yl)acetate

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of (S)-ethyl 2-(2-bromo-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyacetate (30.0 mg, 0.060 mmol) and 1,2-dimethyl-6-(tributylstannyl)-1H-indazol-3(2H)-one (32.5 mg, 0.072 mmol) in dioxane (0.7 mL) was added Pd(PPh3)4 (7.0 mg, 0.006 mmol), CuI (4.0 mg, 0.018 mmol) and LiCl (8.0 mg, 0.182 mmol). The reaction was degassed for 5 minutes with N2 and then heated at 100° C. for 7 h. After cooling, the reaction mixture was diluted with EtOAc, extracted with H2O, brine, dried over Na2SO4, filtered and concentrated and purified by flash column chromatography (silica gel, 0 to 100% ethyl acetate/hexanes) to give the desired product. LCMS-ESI+ (m/z): [M+H]+ calcd for C31H33ClN3O4S: 578.2; found: 578.3.

Workup

  1. customThe reaction was degassed for 5 minutes with N2
  2. temperatureAfter cooling
  3. additionthe reaction mixture was diluted with EtOAc
  4. extractionextracted with H2O, brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. custompurified by flash column chromatography (silica gel, 0 to 100% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-3bcacc4167bd4dbe8f7b60bafc1b4e96
Source dataset
uspto-grants-2015_03
Patent number
US08987250B2

Reaction notes

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