Marathe et al., Journal of the University of Bombay, Science: Physical Sciences, Mathematics, Biological Sciences and Medicine, 1952, vol. 21/3 A, p. 36,37
involves no molecular rearrangement, and which is also stereospecific, for the preparation of alkyl-aryl ethers and thioethers is described. Stable alkoxyphosphonium salts, R-O-P(NMe2)3 PF6-, have been prepared and treated with phenols and thiophenols, under basic conditions, to yield the corresponding alkyl-aryl ethers and thioethers respectively.