Imidazole → Methyl 2-(1,3-benzodioxol-5-yl)-2-[1-methyl-6-(triisopropylsilyloxymethyl)-1H-3-indolyl]acetate

HRID 1934613Notes

Reaction equation

HRID 1934613 reaction equation
Cl[Si:2]([CH:9]([CH3:11])[CH3:10])([CH:6]([CH3:8])[CH3:7])[CH:3]([CH3:5])[CH3:4].[O:12]1[C:16]2[CH:17]=[CH:18][C:19]([CH:21]([C:26]3[C:34]4[C:29](=[CH:30][C:31]([CH2:35][OH:36])=[CH:32][CH:33]=4)[N:28]([CH3:37])[CH:27]=3)[C:22]([O:24][CH3:25])=[O:23])=[CH:20][C:15]=2[O:14][CH2:13]1.N1C=CN=C1>CN(C)C=O>[O:12]1[C:16]2[CH:17]=[CH:18][C:19]([CH:21]([C:26]3[C:34]4[C:29](=[CH:30][C:31]([CH2:35][O:36][Si:2]([CH:9]([CH3:11])[CH3:10])([CH:6]([CH3:8])[CH3:7])[CH:3]([CH3:5])[CH3:4])=[CH:32][CH:33]=4)[N:28]([CH3:37])[CH:27]=3)[C:22]([O:24][CH3:25])=[O:23])=[CH:20][C:15]=2[O:14][CH2:13]1

Participants

5

Reactant 3

HCID 795ImidazoleHCID 139400Triisopropylsilyl chlorideHCID 22467201Methyl 2-(1,3-benzodioxol-5-yl)-2-[6-(hydroxymethyl)1-methyl-1H-3-indolyl]acetate

Product 1

HCID 22467250Methyl 2-(1,3-benzodioxol-5-yl)-2-[1-methyl-6-(triisopropylsilyloxymethyl)-1H-3-indolyl]acetateYield 80.9%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Chlorotriisopropylsilane (0.19 ml, 0.88 mmol) was added to a solution of methyl 2-(1,3-benzodioxol-5-yl)-2-[6-(hydroxymethyl)-1-methyl-1H-3-indolyl]acetate (from step (d), 260 mg, 0.74 mmol) and imidazole (100 mg, 1.47 mmol) in anhydrous dimethylformamide (3 ml). After 3 hours the mixture was partitioned between diethyl ether and water, the organic layer was separated and washed with water. The organic layer was dried (magnesium sulphate), and the solvent removed in vacuo. The residue was flash chromatographed (using 50% dichloromethane, 50% hexane as eluent) to give the subtitle compound (305 mg) as an oil.

Workup

  1. customAfter 3 hours the mixture was partitioned between diethyl ether and water
  2. customthe organic layer was separated
  3. washwashed with water
  4. dry with materialThe organic layer was dried (magnesium sulphate)
  5. customthe solvent removed in vacuo
  6. customchromatographed (using 50% dichloromethane, 50% hexane as eluent)

Sources & evidence

ORD record
ord-e7cfb736908a4cffb64a119d2a67702c
Source dataset
uspto-grants-2002_05
Patent number
US06384070B2

Reaction notes

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