Cyclohexanone → HCID 13076867, compound

Temperature

-30 °C

A mixture of 20.75 g of 2-bromo-4-chloro-phenol, 200 ml of anhydrous tetrahydrofuran cooled to -30° C. was stirred and then 172 ml of a solution of butyllithium in hexane titrating 1.16 M/l were added thereto with stirring over 45 minutes at -30° C. The mixture was stirred for 41/2 hours at -30° C. and was then cooled to -78° C. at which 10.35 ml of cyclohexanone were added over one hour. The mixture was stirred at -75° to -78° C. for 17 hours and the temperature was then allowed to return to room temperature. The mixture was poured into a water-concentrated hydrochloric acid mixture and was then extracted with ether. The ether extracts were washed with water, dried over magnesium sulfate and evaporated to dryness under reduced pressure to obtain 25 g of raw residue. The latter was chromatographed over silica gel H under pressure and elution with methylene chloride yielded 7 g of 4-chloro-2-(1-hydroxycyclohexyl)-phenol melting at 110° C.

1. stirringwith stirring over 45 minutes at -30° C
2. stirringThe mixture was stirred for 41/2 hours at -30° C.
3. additionwere added over one hour
4. stirringThe mixture was stirred at -75° to -78° C. for 17 hours
5. customto return to room temperature
6. extractionwas then extracted with ether
7. washThe ether extracts were washed with water
8. dry with materialdried over magnesium sulfate
9. customevaporated to dryness under reduced pressure
10. customto obtain 25 g of raw residue
11. customThe latter was chromatographed over silica gel H under pressure and elution with methylene chloride

ORD record

ord-f4a6eda4de6a4fdeaeeb660a9bfc48de

Source dataset

uspto-grants-1981_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04281012