Disproportionation reaction of diarylcarbinols: a versatile access to diarylmethanes speeded up using microwave irradiation
Résumé
An efficient synthesis of diarylmethanes under classical thermal conditions and under microwave heating has been established from diarylcarbinols via a new disproportionation reaction. The key step involve a selective hydride transfert of iso-propylic ethers intermediates. Soft experimental procedure using catalytic CBr4 or TfOH in i-PrOH and good yields render this method useful and competitive to the conventional approaches relying on application of external reducing agents.
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