Propargyl alcohol → 4,5-dihydro-3-(3-hydroxy-1-propynyl)-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one

HRID 1606982Notes

Reaction equation

HRID 1606982 reaction equation
I[C:2]1[N:3]=[CH:4][N:5]2[C:11]3[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=3[C:9](=[O:16])[N:8]([CH3:17])[CH2:7][C:6]=12.[CH2:18]([OH:21])[C:19]#[CH:20]>C(NCC)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I>[OH:21][CH2:18][C:19]#[C:20][C:2]1[N:3]=[CH:4][N:5]2[C:11]3[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=3[C:9](=[O:16])[N:8]([CH3:17])[CH2:7][C:6]=12

Participants

6

Reactant 2

HCID 7859Propargyl alcoholHCID 198306774,5-dihydro-3-iodo-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one

Product 1

HCID 198515454,5-dihydro-3-(3-hydroxy-1-propynyl)-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 8021DiethylamineSolvent

Procedure

3.90 g (11.5 mmol) of 4,5-dihydro-3-iodo-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one was heated to boiling under reflux for 5 hours with 0.67 g (12 mmol) of propargyl alcohol, 70 mg of bis-(triphenylphosphine)-palladium(II) dichloride and 10 mg of copper(I) iodide in 30 ml of diethylamine. The solvent was then evaporated, the residue was taken up in methylene chloride, the solid was filtered off and rinsed with ethyl acetate. After drying there was obtained 4,5-dihydro-3-(3-hydroxy-1-propynyl)-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one of melting point 240°-241°.

Workup

  1. customThe solvent was then evaporated
  2. filtrationthe solid was filtered off
  3. washrinsed with ethyl acetate
  4. customAfter drying there

Sources & evidence

ORD record
ord-37dbb2caaae14ebdb7d8e24230c299a9
Source dataset
uspto-grants-1989_09
Patent number
US04863920

Reaction notes

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