Sodium hydride → HCID 23352258, compound

HRID 1742907Notes

Reaction equation

[H-].[Na+].[CH3:3][C:4]([O:7][C:8]([NH:10][C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])=[O:9])([CH3:6])[CH3:5].[CH3:18][O:19][C:20](=[O:31])[C:21]1[CH:26]=[C:25]([CH2:27][Br:28])[CH:24]=[C:23]([CH2:29]Br)[CH:22]=1.[Cl-].[NH4+]>CN(C)C=O>[CH3:18][O:19][C:20](=[O:31])[C:21]1[CH:22]=[C:23]([CH2:29][N:10]([C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[C:8]([O:7][C:4]([CH3:3])([CH3:5])[CH3:6])=[O:9])[CH:24]=[C:25]([CH2:27][Br:28])[CH:26]=1

Participants

Conditions

Temperature: 0 °C

Procedure

A mixture of sodium hydride (3.6 g, 90 mmol) and N,N-dimethylformamide (150 ml) was cooled to 0° C. and treated with solid di-tert-butyliminodicarboxylate (17.4 g, 76.0 mmol) with vigorous stirring. The mixture was stirred at 0° C. for 15 minutes, the ice bath was removed and a solution of methyl-3,5-bis(bromomethyl)-benzoate (23.6 g, 73.2 mmol) in N,N-dimethylformamide was added dropwise over 30 minutes. After 12 hours the mixture was poured into 100 ml 1/4 saturated aqueous ammonium chloride and extracted with the three 100 ml portion of hexanes. The organic layer was dried over magnesium sulfate, concentrated under reduced pressure and chromatographed using a gradient of 10-20% ethyl acetate/hexanes to yield the product (22.0 g, 66% yield). TLC (20% ethyl acetate/hexanes): Rf =0.55 (UV active, CAM stain)

Workup

customthe ice bath was removed
extractionextracted with the three 100 ml portion of hexanes
dry with materialThe organic layer was dried over magnesium sulfate
concentrationconcentrated under reduced pressure
customchromatographed

Sources & evidence

ORD record: ord-c309dd26820a4ca1b3655586ce692b7f
Source dataset: uspto-grants-1994_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05342934

Reaction notes

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