Triphenylphosphine → HCID 18348567, compound

HRID 2268561Notes

Reaction equation

HRID 2268561 reaction equation
[OH:1][CH2:2][CH2:3][CH:4]1[CH2:10][CH2:9][C:8]2[C:11](=[O:20])[C:12]([O:18][CH3:19])=[C:13]([O:16][CH3:17])[C:14](=[O:15])[C:7]=2[CH2:6][CH2:5]1.[CH3:21][O:22][C:23]1[CH:24]=[C:25](O)[CH:26]=[C:27]([O:31][CH3:32])[C:28]=1[O:29][CH3:30].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1>[CH3:17][O:16][C:13]1[C:14](=[O:15])[C:7]2[CH2:6][CH2:5][CH:4]([CH2:3][CH2:2][O:1][C:25]3[CH:26]=[C:27]([O:31][CH3:32])[C:28]([O:29][CH3:30])=[C:23]([O:22][CH3:21])[CH:24]=3)[CH2:10][CH2:9][C:8]=2[C:11](=[O:20])[C:12]=1[O:18][CH3:19]

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 695053,4,5-TrimethoxyphenolHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 183485737-(2-Hydroxyethyl)-2,3-dimethoxy-4,5,6,7,8,9-hexahydro-1H-benzo[a]cycloheptene-1,4-dione

Product 1

HCID 18348567HCID 18348567, compoundYield 79.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution of 7-(2-hydroxyethyl)-2,3-dimethoxy-4,5,6,7,8,9-hexahydro-1H-benzo[a]cycloheptene-1,4-dione (165 mg), 3,4,5-trimethoxyphenol (335 mg), and triphenylphosphine (201 mg) in THF (3 ml) was added a solution of diethyl azodicarboxylate (148 mg) in THF (1 ml) at room temperature. The reaction mixture was stirred at room temperature for 25 min and concentrated. The residue was purified by alumina column chromatography (eluent: ethyl acetate/hexane=1/4) and with recrystallization from ethyl acetate-hexane to obtain the entitled compound (210 mg).

Workup

  1. concentrationconcentrated
  2. customThe residue was purified by alumina column chromatography (eluent: ethyl acetate/hexane=1/4) and with recrystallization from ethyl acetate-hexane

Sources & evidence

ORD record
ord-f93a2c5b1ff047d8894119e9ca3275da
Source dataset
uspto-grants-2001_12
Patent number
US06326369B1

Reaction notes

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