Chloroform → HCID 57781097, compound

HRID 1690717Notes

Reaction equation

HRID 1690717 reaction equation
I[C:2]1[N:6]([CH:7]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[C:10](=[O:17])[O:9][C:8]2([CH3:19])[CH3:18])[CH:5]=[N:4][CH:3]=1.[CH2:20](C([Sn])=C(CCCC)CCCC)[CH2:21]CC.C(Cl)(Cl)Cl.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C(OC(C)C)(=O)C.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].CN(C=O)C>[CH:20]([C:2]1[N:6]([CH:7]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[C:10](=[O:17])[O:9][C:8]2([CH3:19])[CH3:18])[CH:5]=[N:4][CH:3]=1)=[CH2:21]

Participants

8

Reactant 4

HCID 6212ChloroformHCID 11776TriphenylphosphineHCID 53438229Tri(butyl)vinyltinHCID 57781136HCID 57781136, compound

Product 1

HCID 57781097HCID 57781097, compound

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 6228DimethylformamideSolventHCID 7915Isopropyl AcetateSolvent

Conditions

Temperature
90 °C

Procedure

DMF (30 mL) is added to 4-(5-iodo-imidazol-1-yl)-3,3-dimethyl-isochroman-1-one (1.62 g, 4.18 mmol) (Example 2b), tributylvinyltin (2.40 g, 8.36 mmol), Pd2 dba3.CHCl3 (0.087 g, 0.084 mmol) and triphenylphosphine (0.089 g, 0.334 mmol) under nitrogen. The mixture is heated to 90° C., to give a clear tan solution. After 3 h, the mixture is cooled down, diluted with isopropyl acetate and washed twice with water and brine. The combined organic phase is dried over magnesium sulfate and filtered through a cotton plug. The residue is purified by silica gel flash chromatography (10% wt silica gel/KF, elution with dichloromethane-methanol, 49:1 to 24:1) to give 4-(5-vinyl-imidazol-1-yl)-3,3-dimethyl-isochroman-1-one as a yellow solid; MS (ESI) m/z 269.2 (M+H); 1H NMR (400 MHz, MeOD) δ ppm 1.20 (s, 3 H), 1.51 (s, 3 H), 5.42 (br. s, 1 H), 5.69 (s, 1 H), 5.81 (br. s, 1 H), 6.95 (br. s, 1 H), 7.14 (br. s, 1H), 7.21 (s, 1 H), 7.42 (d, J=7.6 Hz, 1 H), 7.58-7.69 (m, 1 H), 7.70-7.80 (m, 1 H), 8.21 (dd, J=7.8, 1.3 Hz, 1 H).

Workup

  1. customto give a clear tan solution
  2. temperaturethe mixture is cooled down
  3. washwashed twice with water and brine
  4. dry with materialThe combined organic phase is dried over magnesium sulfate
  5. filtrationfiltered through a cotton plug
  6. customThe residue is purified by silica gel flash chromatography (10% wt silica gel/KF, elution with dichloromethane-methanol, 49:1 to 24:1)

Sources & evidence

ORD record
ord-3a17397656f849f08f2ad6b97fa02c64
Source dataset
uspto-grants-2012_04
Patent number
US08153674B2

Reaction notes

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