| 摘要 |
1,198,840. Ethers and thioethers. MONSANTO CO. 27 Dec., 1967 [27 Dec., 1966], No. 58621/67. Heading C2C. [Also in Division C3] Ethers and thioethers are prepared by reacting compounds of the formulµ R(F) n and M b [X(Z) d ] c in the presence of a dipolar aprotic solvent, where R is optionally substituted hydrocarbon; M is an alkali or alkaline earth metal; X is O or S; Z is optionally substituted aryl or heterocyclyl of 3-10 carbon atoms and 1-4 oxygen, sulphur and/or nitrogen atoms; n and b are at least 1, c is 1 to b times the valence of the metal M, provided that when M is an alkali metal c is 1, d is 0 or 1, and is 1 when X is S, and when d is 1, M is an alkaline earth metal. |
