Ethyl isocyanate → Ethyl-carbamic acid 3-[2,3-dimethoxy-6-(1-oxo-indan-4-yl)-phenoxymethyl]-oxetan-3-ylmethyl ester

HRID 2171030Notes

Reaction equation

[OH:1][CH2:2][C:3]1([CH2:7][O:8][C:9]2[C:14]([O:15][CH3:16])=[C:13]([O:17][CH3:18])[CH:12]=[CH:11][C:10]=2[C:19]2[CH:27]=[CH:26][CH:25]=[C:24]3[C:20]=2[CH2:21][CH2:22][C:23]3=[O:28])[CH2:6][O:5][CH2:4]1.C(N(CC)CC)C.[CH2:36]([N:38]=[C:39]=[O:40])[CH3:37]>ClCCl>[CH3:16][O:15][C:14]1[C:13]([O:17][CH3:18])=[CH:12][CH:11]=[C:10]([C:19]2[CH:27]=[CH:26][CH:25]=[C:24]3[C:20]=2[CH2:21][CH2:22][C:23]3=[O:28])[C:9]=1[O:8][CH2:7][C:3]1([CH2:2][O:1][C:39](=[O:40])[NH:38][CH2:36][CH3:37])[CH2:4][O:5][CH2:6]1

Participants

Conditions

Temperature: 50 °C

Procedure

To a stirring solution of 4-[2-(3-Hydroxymethyl-oxetan-3-ylmethoxy)-3,4-dimethoxy-phenyl]-indan-1-one (Compound 104)(100 mg, 0.2604 mmol) in dichloromethane (15 mL), were added triethylamine (0.1 mL, 0.772 mmol) and ethyl isocyanate (55 mg, 0.78 mmol) and the resultant reaction mixture was heated to 50° C. for 16 h. The reaction mixture was quenched with sodium bi carbonate solution and extracted with dichloromethane (3×). The combined dichloromethane layer was washed with brine and dried over anhydrous sodium sulphate and concentrated under reduced pressure. Purification by column chromatography (silica gel, 0-25% ethyl acetate in pet ether) to afforded the title compound as a solid.

Workup

customthe resultant reaction mixture
customThe reaction mixture was quenched with sodium bi carbonate solution
extractionextracted with dichloromethane (3×)
washThe combined dichloromethane layer was washed with brine
dry with materialdried over anhydrous sodium sulphate
concentrationconcentrated under reduced pressure
customPurification by column chromatography (silica gel, 0-25% ethyl acetate in pet ether)

Sources & evidence

ORD record: ord-3dc1f574e1b34c4d8100971bd54b01ee
Source dataset: uspto-grants-2015_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09051290B2

Reaction notes

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