2-(4-METHOXYPHENYL)-4,6-DIPHENYLPYRYLIUM TETRAFLUOROBORATE synthesis
- Product Name:2-(4-METHOXYPHENYL)-4,6-DIPHENYLPYRYLIUM TETRAFLUOROBORATE
- CAS Number:2907-13-3
- Molecular formula:C24H19BF4O2
- Molecular Weight:426.22
Yield:2907-13-3 68.77%
Reaction Conditions:
with boron trifluoride diethyl etherate in dichloromethane at 45; for 12 h;Inert atmosphere;
Steps:
3.1
(1) In an argon atmosphere, (E)-1-(4-methoxyphenyl)-3-phenylprop-2-en-1-one (1.00eq, 100mg, 0.42mmol acetophenone (3.0eq, 151mg, 1.259mmol), BF3·Et2O (10mL) and dichloromethane (DCM) were mixed, and the reaction mixture was stirred vigorously at 45°C overnight (about 12h), and cooled to room temperature after the reaction was completed; Add 50 mL of ether (Et2O)to the reaction flask, stir vigorouslyto precipitate the crude product ofthe pyran salt intermediate (R1=H) from the reaction solution, filter, andwash the precipitatewith Et2O to obtain 123 mg of pyran Salt intermediate (R1=H), the yield was 68.77%.
References:
CN111960994,2020,A Location in patent:Paragraph 0051-0053
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