Hydrochloric Acid → [1,1'-Biphenyl]-3-methanol, 2-methyl-

Temperatur

53 °C

Under a nitrogen atmosphere, the reaction mixture from above was decanted into a clean, dry flask, leaving the unreacted magnesium turnings in the first flask. This solution, which contains (2-methyl[1,1'-biphenyl]-3-yl)magnesium chloride, was heated to reflux, and 16.5 g (0.55 mole based on formaldehyde) of polyoxymethylene diacetate (avg. mol. wgt. approx. 50,000, available commercially from E.I. du Pont de Nemours & Co., Inc., Wilmington, Delaware under the trade name Delrin 500 acetal homopolymer resin), milled to about 80 mesh, was added with stirring over three hours. Refluxing was continued for four additional hours after which the reaction mixture was allowed to cool and stand overnight. The mixture was then heated to 53° C. and was poured into a mixture of 100 g of ice, 52 g of concentrated hydrochloric acid, and 200 g of a mixture containing 95% n-octane and 5% toluene (wt/wt). This mixture was filtered and the organic phase separated. The organic solvents were distilled off, boiling range 65°-93° C. During a four hour period the solution was cooled with stirring to approximately 5° C. and was then filtered. The filter cake was washed with 100 mL of cold n-octane and air-dried for 0.5 hour. The filter cake was broken up and dried under a vacuum at 55° C. for four hours, yielding 78.9 g of (2-methyl[1,1'-biphenyl]-3-yl)methanol (89.9% purity), a yield of 70.8% of theory.

1. customUnder a nitrogen atmosphere, the reaction mixture from above was decanted into a clean,
2. customdry flask
3. customleaving the unreacted magnesium turnings in the first flask
4. temperaturewas heated
5. temperatureto reflux
6. additionwas added
7. temperatureRefluxing
8. temperatureto cool
9. waitstand overnight
10. filtrationThis mixture was filtered
11. customthe organic phase separated
12. distillationThe organic solvents were distilled off
13. temperatureDuring a four hour period the solution was cooled
14. stirringwith stirring to approximately 5° C.
15. filtrationwas then filtered
16. washThe filter cake was washed with 100 mL of cold n-octane
17. customair-dried for 0.5 hour
18. customdried under a vacuum at 55° C. for four hours

ORD-Eintrag

ord-92a3c76b19b74c818b82463a9beec670

Quelldatensatz

uspto-grants-1988_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04740637