Lithium Hydroxide → 7-[5-(Cyclopropylmethoxy)-1,3-benzodioxol-4-yl]-2-methyl-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[3,2-b]pyridine-3-carboxylic acid

HRID 2410959Notes

Reaction equation

HRID 2410959 reaction equation
[CH:1]1([CH2:4][O:5][C:6]2[CH:14]=[CH:13][C:9]3[O:10][CH2:11][O:12][C:8]=3[C:7]=2[C:15]2[CH:20]=[CH:19][N:18]=[C:17]3[C:21]([C:33]([O:35]CC)=[O:34])=[C:22]([CH3:32])[N:23]([CH2:24][O:25][CH2:26][CH2:27][Si:28]([CH3:31])([CH3:30])[CH3:29])[C:16]=23)[CH2:3][CH2:2]1.[Li+].[OH-]>O1CCOCC1>[CH:1]1([CH2:4][O:5][C:6]2[CH:14]=[CH:13][C:9]3[O:10][CH2:11][O:12][C:8]=3[C:7]=2[C:15]2[CH:20]=[CH:19][N:18]=[C:17]3[C:21]([C:33]([OH:35])=[O:34])=[C:22]([CH3:32])[N:23]([CH2:24][O:25][CH2:26][CH2:27][Si:28]([CH3:30])([CH3:31])[CH3:29])[C:16]=23)[CH2:3][CH2:2]1

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 67775066Ethyl 7-[5-(cyclopropylmethoxy)-1,3-benzodioxol-4-yl]-2-methyl-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[3,2-b]pyridine-3-carboxylate

Product 1

HCID 677726607-[5-(Cyclopropylmethoxy)-1,3-benzodioxol-4-yl]-2-methyl-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[3,2-b]pyridine-3-carboxylic acid

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Conditions

Temperature
80 °C

Procedure

Ethyl 7-[5-(cyclopropylmethoxy)-1,3-benzodioxol-4-yl]-2-methyl-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[3,2-b]pyridine-3-carboxylate from example D.b1 (15.28 g; 29.0 mmol) is dissolved in 1,4-dioxane (150 mL) and aqueous LiOH (prepared from 1.04 g; 43.5 mmol; and 75 mL of water). The stirred reaction mixture is heated to 80° C. until the starting material is consumed according to LC-MS. The mixture is concentrated under reduced pressure, and diluted with water. The product is precipitated by addition of 2M citric acid to adjust pH to 5, isolated by suction filtration, washed with several small portions of water and dried in high vacuo at 40° C. to yield the title compound as pale yellow solid.

Workup

  1. customThe stirred reaction mixture
  2. customis consumed
  3. concentrationThe mixture is concentrated under reduced pressure
  4. additiondiluted with water
  5. customThe product is precipitated by addition of 2M citric acid
  6. customisolated by suction filtration
  7. washwashed with several small portions of water
  8. customdried in high vacuo at 40° C.

Sources & evidence

ORD record
ord-6305f2f4ad33400189dd38ecbac150c8
Source dataset
uspto-grants-2014_08
Patent number
US08816085B2

Reaction notes

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