4-Chlorophenylacetyl chloride → Ethanone, 2-(4-chlorophenyl)-1-phenyl-

To a suspension of aluminum chloride (1.27 g, 9.52 mmol) in 30 ml dry benzene under nitrogen was added at room temperature 4-chlorophenylacetyl chloride (1.80 g, 9.52 mmol) over a period of 30 minutes as a solution in 10 ml benzene. The resulting clear, pale yellow solution was refluxed for six hours. After cooling to room temperature, the resulting grey-brown solution was poured into 100 ml ice water. The layers were separated and the aqueous portion extracted with benzene (1×20 ml). The combined organic portions were washed with water (2×30 ml), 10% NaOH (1×30 ml), water (1×30 ml), and brine (1×30 ml), and dried over magnesium sulfate. Filtration through Celite afforded, after concentration in vacuo, 2.18 g of the ketone as a white crystalline solid (99% crude yield): Rf 0.46 (benzene); 1H NMR (CDCl3) 8.03 (d, J=7.2 Hz, 2H), 7.63-7.21 (m, 7H), 4.29 (s, 2H). A portion (ca. 1 g) of the ketone was recrystallized from 75 ml boiling pet. ether/ethanol (5:1) to give a fluffy white crystalline solid: m.p. 132.5-134.0° C. (lit. m.p. 135-136° C.; Loeshorn, C. H. et al., J. Org. Chem. 48:4409 (1983)).

1. temperatureThe resulting clear, pale yellow solution was refluxed for six hours
2. customThe layers were separated
3. extractionthe aqueous portion extracted with benzene (1×20 ml)
4. washThe combined organic portions were washed with water (2×30 ml), 10% NaOH (1×30 ml), water (1×30 ml), and brine (1×30 ml)
5. dry with materialdried over magnesium sulfate
6. filtrationFiltration through Celite
7. customafforded
8. concentrationafter concentration in vacuo, 2.18 g of the ketone as a white crystalline solid (99% crude yield)
9. customA portion (ca. 1 g) of the ketone was recrystallized from 75 ml
10. customto give a fluffy white crystalline solid

ORD record

ord-23095b05e32643cd822c41e45b99efed

Source dataset

uspto-grants-2000_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06017910