R. Beugelmans et al., AN EASY ACCESS TO FUNCTIONALIZED DIARYL ETHERS - FORMAL TOTAL SYNTHESIS OF K-13, Tetrahedron letters, 35(31), 1994, pp. 5649-5652
As an alternative to the Ullmann ether synthesis, the SNAr reaction le
d to an efficient one step synthesis of chiral bis-aminoacid diaryl et
hers, important intermediates in the synthesis of K-13.