(R)-2-(5-methyl-1,2,4-oxadiazol-3-yl)but-3-yn-2-ol → HCID 86693522, compound

HRID 575459Notes

Reaction equation

HRID 575459 reaction equation
I[C:2]1[CH:18]=[CH:17][C:5]2[O:6][CH2:7][CH2:8][C:9]3[N:10]([N:11]=[C:12]([C:14]([NH2:16])=[O:15])[CH:13]=3)[C:4]=2[CH:3]=1.[CH3:19][C:20]1[O:24][N:23]=[C:22]([C@:25]([OH:29])([C:27]#[CH:28])[CH3:26])[N:21]=1>N1CCCCC1.[Cu]I.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>[OH:29][C@:25]([C:22]1[N:21]=[C:20]([CH3:19])[O:24][N:23]=1)([CH3:26])[C:27]#[C:28][C:2]1[CH:18]=[CH:17][C:5]2[O:6][CH2:7][CH2:8][C:9]3[N:10]([N:11]=[C:12]([C:14]([NH2:16])=[O:15])[CH:13]=3)[C:4]=2[CH:3]=1

Participants

6

Reactant 2

HCID 86669593(R)-2-(5-methyl-1,2,4-oxadiazol-3-yl)but-3-yn-2-olHCID 86693521HCID 86693521, compound

Product 1

HCID 86693522HCID 86693522, compoundYield 49.9%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 8082PiperidineSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of 9-iodo-4,5-dihydrobenzo[b]pyrazolo[1,5-d][1,4]oxazepine-2-carboxamide (100 mg, 0.28 mmol), (R)-2-(5-methyl-[1,2,4]oxadiazol-3-yl)-but-3-yn-2-ol (70 mg, 0.46 mmol), and copper(I) iodide (10 mg, 0.05 mmol) in piperidine (1.5 ml) was sonicated under a stream of argon for 15 minutes. After the addition of tetrakis(triphenylphosphine)palladium (0) (40 mg, 0.035 mmol) the mixture was heated at 60° C. for 3 hours before the being concentrated. The residue was taken up in ethyl acetate (100 ml) and pre-absorbed onto a small amount of silica. Purification by FCC (silica, 0-10% methanol in dichloromethane) gave a solid residue, which was re-crystallised from heptane/dichloromethane (˜10 ml, 2/1). Filtration and drying of the crystalline material under high vacuum provided 53 mg (40%) of the title compound. 1H NMR (500 MHz, DMSO-d6) δ ppm 1.83 (3H, s), 2.61 (3H, s), 3.17 (2H, t, J=5.80 Hz), 4.49 (2H, t, 0.1=5.80 Hz), 6.71 (1H, s), 6.74 (1H, s), 7.22 (1H, d, J=8.39 Hz), 7.35 (1H, s), 7.38 (1H, dd, J=8.32, 2.06 Hz), 7.81 (1H, s), 8.03 (1H, d, J=1.98 Hz); M+1=380.

Workup

  1. customwas sonicated under a stream of argon for 15 minutes
  2. concentrationbeing concentrated
  3. custompre-absorbed onto a small amount of silica
  4. customPurification by FCC (silica, 0-10% methanol in dichloromethane)
  5. customgave a solid residue, which
  6. customwas re-crystallised from heptane/dichloromethane (˜10 ml, 2/1)
  7. filtrationFiltration
  8. customdrying of the crystalline material under high vacuum

Sources & evidence

ORD record
ord-f9e0cd701baf4030ab827e993df0f4f5
Source dataset
uspto-grants-2015_05
Patent number
US09034866B2

Reaction notes

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