Phenylacetylene → 7-chloro-4,5-dihydro-5-methyl-3-(phenylethynyl)-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one

HRID 1606974Notes

Reaction equation

HRID 1606974 reaction equation
[Cl:1][C:2]1[C:7]2[C:8](=[O:18])[N:9]([CH3:17])[CH2:10][C:11]3[N:12]([CH:13]=[N:14][C:15]=3I)[C:6]=2[CH:5]=[CH:4][CH:3]=1.[C:19]1([C:25]#[CH:26])[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1>C(NCC)C.C(Cl)Cl.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>[Cl:1][C:2]1[C:7]2[C:8](=[O:18])[N:9]([CH3:17])[CH2:10][C:11]3[N:12]([CH:13]=[N:14][C:15]=3[C:26]#[C:25][C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)[C:6]=2[CH:5]=[CH:4][CH:3]=1

Participants

7

Reactant 2

HCID 10821PhenylacetyleneHCID 198306597-chloro-4,5-dihydro-3-iodo-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one

Product 1

HCID 198515867-chloro-4,5-dihydro-5-methyl-3-(phenylethynyl)-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6344DichloromethaneSolventHCID 8021DiethylamineSolvent

Procedure

3.73 g (10 mmol) of 7-chloro-4,5-dihydro-3-iodo-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one was stirred at room temperature for 20 hours with 1.12 g (11 mmol) of phenylacetylene, 70 mg of bis-(triphenylphosphine)-palladium(II) dichloride and 10 mg of copper(I) iodide in 20 ml of diethylamine. The reaction mixture was diluted with methylene chloride and washed twice with water. The organic phase was dried over magnesium sulphate and evaporated. After recrystallization of the residue from ethyl acetate there was obtained 7-chloro-4,5-dihydro-5-methyl-3-(phenylethynyl)-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one of melting point 205°-206°.

Workup

  1. washwashed twice with water
  2. dry with materialThe organic phase was dried over magnesium sulphate
  3. customevaporated
  4. customAfter recrystallization of the residue from ethyl acetate

Sources & evidence

ORD record
ord-c1e96e49dc684b63ab9074ffbe357701
Source dataset
uspto-grants-1989_09
Patent number
US04863920

Reaction notes

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