Dimethylformamide → tert-Butyl 4-cyanophenethylcarbamate

HRID 1942104Notes

Reaction equation

HRID 1942104 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([CH2:8][CH2:9][NH:10][C:11](=[O:17])[O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[CH:4][CH:3]=1.[CH3:18][N:19](C=O)C>[C-]#N.[C-]#N.[Zn+2].C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:18]([C:2]1[CH:7]=[CH:6][C:5]([CH2:8][CH2:9][NH:10][C:11](=[O:17])[O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[CH:4][CH:3]=1)#[N:19]

Participants

5

Reactant 2

HCID 6228DimethylformamideHCID 14221818[2-(4-Bromo-phenyl)ethyl]-carbamic acid tert-butyl ester

Product 1

HCID 21955533tert-Butyl 4-cyanophenethylcarbamateYield 31%

Reagents, catalysts & solvents 2

HCID 11186Zinc cyanide (Zn(CN)2)CatalystHCID 178418397HCID 178418397, compoundCatalyst

Conditions

Temperature
150 °C

Procedure

Compound 113 (530 mg, 1.8 mmol) was dissolved in dry DMF (17 mL) under N2.Zn(CN)2 (416 mg, 3.6 mmol) and Pd(PPh3)4 (200 mg, 0.18 mmol) was added. The reaction mixture was stirred and heated at 150° C. in a microwave instrument (CEM Discover®) for 20 min and the reaction mixture was then concentrated in vacuo. The residue was purified by flash chromatography on silica gel eluting with EtOAc/hexanes (20˜80%) to yield 114 (540 mg, 31%) as a white solid. MS (APCI, negative): m/z 245 [M−H]+.

Workup

  1. concentrationthe reaction mixture was then concentrated in vacuo
  2. customThe residue was purified by flash chromatography on silica gel eluting with EtOAc/hexanes (20˜80%)

Sources & evidence

ORD record
ord-d0d8616829d342ac968240caa9d95c4e
Source dataset
uspto-grants-2013_03
Patent number
US08389529B2

Reaction notes

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