专利号:US-3876689-A 优先权日:1972-08-28 标题:One-step synthesis of alpha, beta-unsaturated sulfonate salts by the reaction of carbon tetrahalides with certain sulfones 发明人:MEYERS CAL Y; HO LAURENCE L 权利人:UNIV SOUTHERN ILLINOIS 摘要:.alpha.,.beta.-Unsaturated sulfonic acid salts are prepared by a one step synthesis involving reaction of a di-primary alkyl sulfone, an arylmethyl primary alkyl sulfone, an .alpha.-halo diprimary alkyl sulfone, or an .alpha.-haloarylmethyl primary alkyl sulfone with a carbon tetrahalide and a strong base. The sulfone substrate is reacted with a carbon tetrahalide represented by the formula CBr.sub.m Cl.sub.n F.sub.p where m and n are integers between 0 and 4 inclusive, p is an integer between 0 and 2 inclusive and m+n+p = 4 in the presence of the strong base to form a geminally .alpha.-dihalogenated intermediate and dihalocarbene. The geminally .beta.-dihalogenated intermediate reacts rapidly in situ with the strong base to form an .alpha.,.beta.-unsaturated sulfonic acid salt and a halide salt. The unsaturated sulfonic acid salt may be acidified to form the corresponding acid or reacted with a halogenating agent to form the corresponding acid halide. .alpha.,.beta.-Unsaturated sulfonic acid salts are useful detergents.
专利号:US-6762329-B2 优先权日:1997-10-06 标题 :Diaryl ether condensation reactions 发明人:MARCOUX JEAN-FRANCOIS; DOYE SVEN; BUCHWALD STEPHEN 权利人:MASSACHUSETTS INST TECHNOLOGY 摘要:One aspect of the present invention relates to novel reaction conditions that allow the efficient synthesis of diaryl ethers from arenes bearing a leaving group and arenols under relatively mild conditions. Another aspect of the present invention relates to the dramatic effects of acidic activators on Ullmann-type couplings involving electron-poor and/or relatively insoluble substrates.