An efficient method for the synthesis of (E)-1,2-dichloro- 1-phenoxyethenes 2 has been developed. The reaction of phenol derivatives 1 with trichloroethylene at ambient temperature by means of Cs2CO3-DMSO system furnished the corresponding aryl vinyl ethers 2 in excellent yields. On the other hand, the same reaction of phenol derivatives li, 1k and 1p possessing an electron-withdrawing group at the o- or p-position of the hydroxy group required a harsh reaction conditions to heat at 70 degrees C for the synthesis of the desired products 2i, 2k and 2p.
Pielichowski, Jan; Bogdal, Dariusz, Polish Journal of Chemistry, 1988, vol. 62, # 4-6, p. 483 - 487
作者:Pielichowski, Jan、Bogdal, Dariusz
DOI:——
日期:——
PIELICHOWSKI, JAN;BOGDAL, DARIUSZ, POL. J. CHEM., 62,(1988) N-6, C. 483-487
作者:PIELICHOWSKI, JAN、BOGDAL, DARIUSZ
DOI:——
日期:——
2-Substituted Benzo[b]furans from (E)-1,2-Dichlorovinyl Ethers and Organoboron Reagents: Scope and Mechanistic Investigations into the One-Pot Suzuki Coupling/Direct Arylation
作者:Laina M. Geary、Philip G. Hultin
DOI:10.1002/ejoc.201000787
日期:2010.10
phenols, boronic acids or other organoboron reagents, and trichloroethylene. The overall process requires only two synthetic steps, with the key step being a one-pot sequential Suzukicross-coupling/direct arylationreaction. The method tolerates many useful functional groups and does not require the installation of any other activating functionality. The modular nature of the process permits the rapid