Nitrogen → tert-butyl 4-[(6-cyano-5-methoxy-3,4-dihydro-1H-isochromen-1-yl)methyl]piperazine-1-carboxylate

HRID 2173287Notes

Reaction equation

HRID 2173287 reaction equation
Br[C:2]1[C:3]([O:26][CH3:27])=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]([CH2:12][N:13]1[CH2:18][CH2:17][N:16]([C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])[CH2:15][CH2:14]1)[O:7][CH2:6][CH2:5]2.N#N.[CH3:30][N:31](C=O)C>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-]#N.[C-]#N.[Zn+2]>[C:30]([C:2]1[C:3]([O:26][CH3:27])=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]([CH2:12][N:13]1[CH2:18][CH2:17][N:16]([C:19]([O:21][C:22]([CH3:23])([CH3:24])[CH3:25])=[O:20])[CH2:15][CH2:14]1)[O:7][CH2:6][CH2:5]2)#[N:31]

Participants

6

Reactant 3

HCID 947NitrogenHCID 6228DimethylformamideHCID 68433391tert-butyl 4-[(6-bromo-5-methoxy-3,4-dihydro-1H-isochromen-1-yl)methyl]piperazine-1-carboxylate

Product 1

HCID 67517697tert-butyl 4-[(6-cyano-5-methoxy-3,4-dihydro-1H-isochromen-1-yl)methyl]piperazine-1-carboxylate

Reagents, catalysts & solvents 2

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

Procedure

To a solution of tert-butyl 4-[(6-bromo-5-methoxy-3,4-dihydro-1H-isochromen-1-yl)methyl]piperazine-1-carboxylate (50 mg, 0.11 mmol), Pd(PPh3)4 (20 mg) and Zn(CN)2 (26 mg, 0.23 mmol) in 5 mL of anhydrous DMF was to 110° C. at N2 atmosphere overnight. The reaction was cooled to room temperature, extracted by EtOAc, washed by water then by brine. The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified with prep-TLC to afford tert-butyl 4-[(6-cyano-5-methoxy-3,4-dihydro-1H-isochromen-1-yl)methyl]piperazine-1-carboxylate.

Workup

  1. extractionextracted by EtOAc
  2. washwashed by water
  3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  4. concentrationconcentrated
  5. customThe residue was purified with prep-TLC

Sources & evidence

ORD record
ord-89986f29258e4ca5b6deff20df97e613
Source dataset
uspto-grants-2015_06
Patent number
US09056859B2

Reaction notes

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