A mild and efficient ultrasound-assisted synthesis of diaryl ethers without any catalyst

Diaryl ethers have been prepared by a mild and efficient SNAr reaction by coupling of various phenols including that having a electron-withdrawing group with activated fluoroarenes using sonication in good to excellent yields at very low temperature (58 degrees C) under catalyst-free. (C) 2007 Elsevier B.V. All rights reserved.