3-Ethyl-1-pentyn-3-ol → HCID 19851544, compound

HRID 1606985Notes

Reaction equation

HRID 1606985 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.[CH2:19]([C:21]([OH:26])([CH2:24][CH3:25])[C:22]#[CH:23])[CH3:20]>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>[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:20]#[C:19][C:21]([CH2:24][CH3:25])([OH:26])[CH2:22][CH3:23])[C:6]=2[CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 2

HCID 226983-Ethyl-1-pentyn-3-olHCID 198306597-chloro-4,5-dihydro-3-iodo-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one

Product 1

HCID 19851544HCID 19851544, compound

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 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 heated to boiling under reflux for 2 hours with 1.40 g (12.5 mmol) of 3-ethyl-1-pentyn-3-ol, 70 mg of bis-(triphenylphosphine)-palladium(II) dichloride and 10 mg of copper(I) iodide in 30 ml of diethylamine. The reaction mixture was evaporated and the residue was chromatographed on silica gel while eluting with ethyl acetate. After recrystallization from ethyl acetate there was obtained 7-chloro-3-(3-ethyl-3-hydroxy-1-pentynyl)-4,5-dihydro-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one of melting point 186°-188°.

Workup

  1. customThe reaction mixture was evaporated
  2. customthe residue was chromatographed on silica gel
  3. washwhile eluting with ethyl acetate
  4. customAfter recrystallization from ethyl acetate

Sources & evidence

ORD record
ord-2716865d2b544e40b098538bfcbf67b3
Source dataset
uspto-grants-1989_09
Patent number
US04863920

Reaction notes

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