Trimethyl borate → 9,10-Diphenylanthracene-2-boronic Acid

In an argon atmosphere, 100 mL of dehydrated THF were added to 10 g (20 mmol) of 2-bromo-9,10-di(2-naphtyl)anthracene, and the temperature of the mixture was cooled to −78° C. Then, 14 mL of n-butyllithium (in hexane, 1.6 mol/L) were dropped. After the mixture had been stirred at −78° C. for 1 hour, the temperature of the mixture was increased to 0° C. The temperature of the mixture was cooled to −78° C. again, and 6.6 mL (60 mmol) of trimethoxyborane were added. The mixture was stirred at −78° C. for 1 hour, and was then stirred at room temperature for 2 hours. 100 mL of 10-mass % hydrochloric were added, and the whole was stirred for 1 hour, followed by filtration. The resultant solid was washed with toluene to obtain 4.7 g of 9,10-diphenylanthracene-2-boronic acid (50% yield).

1. temperaturethe temperature of the mixture was increased to 0° C
2. temperatureThe temperature of the mixture was cooled to −78° C. again
3. stirringThe mixture was stirred at −78° C. for 1 hour
4. stirringwas then stirred at room temperature for 2 hours
5. addition100 mL of 10-mass % hydrochloric were added
6. stirringthe whole was stirred for 1 hour
7. filtrationfollowed by filtration
8. washThe resultant solid was washed with toluene

ORD-Eintrag

ord-95c1ccb31bb145ca9bf24ac3c37edd47

Quelldatensatz

uspto-grants-2010_11

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07833632B2