4-Methylpentyn-3-ol → 1-(5-(((tert-butyldiphenylsilyl)oxy)methyl)-1,6-bis(methylsulfonyl)-1H-indol-2-yl)-2-methylpropan-1-ol

HRID 1521498Notes

Reaction equation

HRID 1521498 reaction equation
[Si:1]([O:18][CH2:19][C:20]1[C:25]([S:26]([CH3:29])(=[O:28])=[O:27])=[CH:24][C:23]([NH:30][S:31]([CH3:34])(=[O:33])=[O:32])=[C:22](I)[CH:21]=1)([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:36][CH:37]([CH3:42])[CH:38]([OH:41])[C:39]#[CH:40]>C1COCC1.CCN(CC)CC.CCOC(C)=O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I>[Si:1]([O:18][CH2:19][C:20]1[CH:21]=[C:22]2[C:23](=[CH:24][C:25]=1[S:26]([CH3:29])(=[O:28])=[O:27])[N:30]([S:31]([CH3:34])(=[O:33])=[O:32])[C:39]([CH:38]([OH:41])[CH:37]([CH3:42])[CH3:36])=[CH:40]2)([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

8

Reactant 2

HCID 982794-Methylpentyn-3-olHCID 89814617N-(4-(((tert-butyldiphenylsilyl)oxy)methyl)-2-iodo-5-(methylsulfonyl)phenyl)methanesulfonamide

Product 1

HCID 898159981-(5-(((tert-butyldiphenylsilyl)oxy)methyl)-1,6-bis(methylsulfonyl)-1H-indol-2-yl)-2-methylpropan-1-olYield 90%

Reagents, catalysts & solvents 5

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 8028TetrahydrofuranSolventHCID 8471TriethylamineSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
65 °C

Procedure

PdCl2(PPh3)2 (277 mg, 0.38 mmol) and CuI (73 mg, 0.38 mmol) were added to a solution of N-(4-(((tert-butyldiphenylsilyl)oxy)methyl)-2-iodo-5-(methylsulfonyl)phenyl)methanesulfonamide (2.45 g, 3.8 mmol) in THF (20 mL) and Et3N (10 mL). The mixture was purged with nitrogen for 10 mins followed by addition of 4-methylpent-1-yn-3-ol (745 mg, 7.6 mmol) and stirred at 65° C. for 8 h. The reaction mixture was diluted with EtOAc (50 mL) and washed with 1N HCl (50 mL). The organic layer was separated, and the aqueous layer was extracted with EtOAc (3×50 mL). The combined organic solution was washed with brine, dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by flash chromatography over silica gel eluting with EtOAc/hexanes (3/7) to provide 1-(5-(((tert-butyldiphenylsilyl)oxy)methyl)-1,6-bis(methylsulfonyl)-1H-indol-2-yl)-2-methylpropan-1-ol (2.1 g, 90% yield). LC-MS m/z 614 [M+H]+. 1H NMR (400 MHz, CDCl3): δ 8.68 (s, 1H), 7.90 (s, 1H), 7.71-7.67 (s, 4H), 7.46-7.35 (m, 6H), 6.77 (s, 1H), 5.21 (d, J=3.2 Hz, 2H), 6.94 (t, J=6.8 Hz, 1H), 3.22 (s, 3H), 2.90 (s, 3H), 2.61 (d, J=6.8 Hz, 1H), 2.37-2.32 (m, 1H), 1.12 (s, 9H), 1.05 (d, J=6.8 Hz, 3H), 1.03 (d, J=6.8 Hz, 3H). 13C NMR (100 MHz, CDCl3): δ 147.25, 135.54, 135.28, 135.00, 133.66, 133.00, 132.89, 129.96, 127.85, 121.68, 115.96, 108.69, 72.30, 62.98, 44.33, 41.59, 32.88, 26.89, 20.23, 19.30, 17.61.

Workup

  1. customThe mixture was purged with nitrogen for 10 mins
  2. washwashed with 1N HCl (50 mL)
  3. customThe organic layer was separated
  4. extractionthe aqueous layer was extracted with EtOAc (3×50 mL)
  5. washThe combined organic solution was washed with brine
  6. dry with materialdried over anhydrous Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated under reduced pressure
  9. customThe residue was purified by flash chromatography over silica gel eluting with EtOAc/hexanes (3/7)

Sources & evidence

ORD record
ord-f4b1d42c7b224223b4725c5964040005
Source dataset
uspto-grants-2015_07
Patent number
US09073931B2

Reaction notes

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