Bis(4-bromo-2-methyl-1h-inden-1-yl)dimethylsilane → HCID 12162320, compound

HRID 605029Notes

Reaction equation

HRID 605029 reaction equation
[C:1]([C:5]1[CH:10]=[CH:9][C:8]([Mg]Br)=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].Br[C:14]1[CH:22]=[CH:21][CH:20]=[C:19]2[C:15]=1[CH:16]=[C:17]([CH3:37])[CH:18]2[Si:23]([CH:26]1[C:34]2[C:29](=[C:30](Br)[CH:31]=[CH:32][CH:33]=2)[CH:28]=[C:27]1[CH3:36])([CH3:25])[CH3:24]>C1COCC1.[Cl-].[Cl-].[Zn+2].CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C>[C:1]([C:5]1[CH:10]=[CH:9][C:8]([C:14]2[CH:22]=[CH:21][CH:20]=[C:19]3[C:15]=2[CH:16]=[C:17]([CH3:37])[CH:18]3[Si:23]([CH:26]2[C:34]3[C:29](=[C:30]([C:8]4[CH:9]=[CH:10][C:5]([C:1]([CH3:4])([CH3:3])[CH3:2])=[CH:6][CH:7]=4)[CH:31]=[CH:32][CH:33]=3)[CH:28]=[C:27]2[CH3:36])([CH3:25])[CH3:24])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 2

HCID 59832509Bis(4-bromo-2-methyl-1h-inden-1-yl)dimethylsilaneHCID 178440986HCID 178440986, compound

Product 1

HCID 12162320HCID 12162320, compound

Reagents, catalysts & solvents 3

HCID 3007855ZincchlorideCatalystHCID 178418851HCID 178418851, compoundCatalystHCID 8028TetrahydrofuranSolvent4×

Procedure

In an argon atmosphere, to a solution of 15 mL of THF with 29.0 ml of 0.5 M ZnCl2 (14.5 mmol) in THF, 13.0 ml of 1.0 M 4-(tert-butyl) phenylmagnesium bromide (13.0 mmol) in THF was added at ambient temperature. This mixture was stirred for 1 hour, and, then, 10.0 ml of 0.02 M Pd(PtBu3)2 (0.20 mmol, 4 mol. %) in THF and 2.37 g (5.0 mmol) of 1 were added. The resulting mixture was stirred for 5 hours at reflux. The product was isolated by flash chromatography on Silica Gel 60 (40-63 μm, d 30 mm, l 100 mm; eluent: hexanes). Yield 2.85 g (98%) of white solid of ca. 1 to 1 mixture of rac- and meso-compounds.

Workup

  1. stirringThe resulting mixture was stirred for 5 hours
  2. temperatureat reflux
  3. customThe product was isolated by flash chromatography on Silica Gel 60 (40-63 μm, d 30 mm, l 100 mm; eluent: hexanes)

Sources & evidence

ORD record
ord-5f3c16d952474ba2bd5f48f9f6a63a2c
Source dataset
uspto-grants-2011_03
Patent number
US07910783B2

Reaction notes

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