Efficient preparation of E-β-iodovinyl phenylsulfone by Finkelstein reaction at a vinylic center
摘要:
Treatment of E-beta-chlorovinyl phenylsulfone, a crystalline compound that can be conveniently prepared on a large scale from 1,1,2-trichloroethane, by sodium iodide in acetone at ca 130 degrees C, in a sealed vessel affords the title iodosulfone in good yield. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
The reactions of several gem- and vic-polychloroethanes containing 3–5 Cl atoms with PhONa in dimethyl sulfoxide and with PhSNa in N,N-dimethylformamide were examined. Either the mono-, di-, or tetra-substituted compounds of polychloroethylenes were obtained as the main products, depending on the kinds of substrates as well as on the amounts of the bases. The reaction products from polychloroethylenes
A novel two-step method for the preparation of (E)-2-chlorovinylthioarenes (or hetarenes) from thiols and 1,1,2-trichloroethane in the phase transfer catalytic systems solid K2CO3/solid KI/18-crown-6/xylene and solid KOH/18-crown-6/toluene has beendeveloped. (E)-2-chlorovinylthioarenes were isolated in yields up to 98%. Utilization of (E)-2-chlorovinylthioarenes in the Heck and Stille reactions has been shown.
Mirskova,A.N. et al., Journal of Organic Chemistry USSR (English Translation), 1979, vol. 15, p. 1652 - 1659
作者:Mirskova,A.N. et al.
DOI:——
日期:——
TANIMOTO S.; TANIYASU R.; TAKAHASHI T.; MIYAKE T.; OKANO M., BULL. CHEM. SOC. JAP. <BCSJ-A8>, 1976, 49, NO 7, 1931-1936
作者:TANIMOTO S.、 TANIYASU R.、 TAKAHASHI T.、 MIYAKE T.、 OKANO M.