Diethyl Ether → 1,1-Diphenylacetone

HRID 864492Notes

Reaction equation

[C:1]1([CH:7]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[C:8](Cl)=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH2:17]([Sn](CCCC)(CCCC)COCC1C=C(C(F)(F)F)C=C(C(F)(F)F)C=1)CCC.C(OCC)C.[F-].[K+]>C(Cl)(Cl)Cl>[C:1]1([CH:7]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[C:8](=[O:9])[CH3:17])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

Conditions

Temperature: 80 °C

Procedure

Diphenylacetyl chloride (4.6 g), tri-n-butyl-((3,5-bis(trifluoromethyl)phenyl)methyloxymethyl)tin (12.6 g; Example 1a, (Method Ai)and benzylchlorobis(triphenylphosphine) palladium (II)(80 mg)were dissolved in chloroform (10 ml) and the solution heated at 80° C. for 6h. On cooling diethyl ether and saturated aqueous potassium fluoride were added and after 30 minutes the solution was filtered through Hiflo™. The organic layer was washed with water, saturated brine and dried (MgSO4). After evaporation in vacuo the residual oil was purified by chromatography on silica gel (eluting with 0 to 10% ethyl acetate in petroleum ether bp=60°-80° C.) to give 1-(3,5-bis(trifluoromethyl)phenyl)methyloxy)-3,3-diphenyl acetone as an oil. 1H NMR (CDCl3, 360MHz) δ7.80 (1H; s; 4-aryl CH) 7.71 (2H; s; 2,6-aryl CH), 7.43-7.24 (10H; m; phenyl), 5.30 (1H; s; Ph2CH), 4.56 (2H; s), 4.31 (2H; s). m/e Found 452.1191, C24H13F6O2 requires 452.12110.

Workup

additionwere added and after 30 minutes the solution
filtrationwas filtered through Hiflo™
washThe organic layer was washed with water, saturated brine
dry with materialdried (MgSO4)
customAfter evaporation in vacuo the residual oil
customwas purified by chromatography on silica gel (eluting with 0 to 10% ethyl acetate in petroleum ether bp=60°-80° C.)

Sources & evidence

ORD record: ord-cfa0d90d320c4607a1d2e6bcdc8c5fd8
Source dataset: uspto-grants-1996_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05563161

Reaction notes

Loading…