Iodine → 2,2,4-Trimethyl-1,2-dihydro-6-oxa-1-azachrysen-5-one

HRID 1966259Notes

Reaction equation

[NH2:1][C:2]1[CH:3]=[CH:4][C:5]2[C:14]3[C:9](=[CH:10][CH:11]=[CH:12][CH:13]=3)[O:8][C:7](=[O:15])[C:6]=2[CH:16]=1.II>CC(C)=O>[CH3:6][C:5]1([CH3:14])[CH:4]=[C:3]([CH3:2])[C:16]2[C:2](=[CH:3][CH:4]=[C:5]3[C:6]=2[C:7](=[O:15])[O:8][C:9]2[C:14]3=[CH:13][CH:12]=[CH:11][CH:10]=2)[NH:1]1

Participants

Conditions

Temperature: 105 °C

Procedure

In a pressure tube, 8-aminobenzo[c]chromen-6-one (Reference Compound No. 1-1-(2), 8.81 g, 41.7 mmol) was dissolved in acetone (300 ml . . . ), then iodine (4.24 g, 16.7 mmol) was added thereto, then the pressure tube was sealed, and then the reaction mixture was stirred at 105° C. for 2 days. After cooling down, the solvent was removed under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate) to give the titled reference compound (4.83 g) as a yellow solid. (Yield 40%)

Workup

customthe pressure tube was sealed
temperatureAfter cooling down
customthe solvent was removed under reduced pressure
customThe obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate)

Sources & evidence

ORD record: ord-87992de327be4e00add2fb1853679525
Source dataset: uspto-grants-2013_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08420635B2

Reaction notes

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