Potassium Cyanide → methyl (S)-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate

HRID 1902435Notes

Reaction equation

HRID 1902435 reaction equation
[O:1]=[C:2]1[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[N:6]2[CH:13]=[N:14][C:15]([C:16]([O:18][CH2:19]C)=[O:17])=[C:5]2[C@@H:4]2[CH2:21][CH2:22][CH2:23][N:3]12.[C-]#N.[K+]>CO>[O:1]=[C:2]1[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[N:6]2[CH:13]=[N:14][C:15]([C:16]([O:18][CH3:19])=[O:17])=[C:5]2[C@@H:4]2[CH2:21][CH2:22][CH2:23][N:3]12

Participants

4

Reactant 2

HCID 9032Potassium CyanideHCID 10041121Ethyl (7S)-12-oxo-2,4,11-triazatetracyclo[11.4.0.02,6.07,11]heptadeca-1(17),3,5,13,15-pentaene-5-carboxylate

Product 1

HCID 54213103methyl (S)-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A mixture of 311 mg (1 mmol) of ethyl (S)-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate, 66 mg of potassium cyanide and 10 ml of absolute methanol is heated to boiling under reflux for 6 hours. The mixture is concentrated, a small amount of water is added, the mixture is extracted three times with 10 ml of chloroform each time, dried over magnesium sulphate, evaporated and recrystallised from ethyl acetate/hexane. There is obtained methyl (S)-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate of melting point 165°-167° C.

Workup

  1. temperatureis heated
  2. temperatureunder reflux for 6 hours
  3. concentrationThe mixture is concentrated
  4. additiona small amount of water is added
  5. extractionthe mixture is extracted three times with 10 ml of chloroform each time
  6. dry with materialdried over magnesium sulphate
  7. customevaporated
  8. customrecrystallised from ethyl acetate/hexane

Sources & evidence

ORD record
ord-7f6a76a69414453e991f56609360b0e9
Source dataset
uspto-grants-1982_12
Patent number
US04363762

Reaction notes

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