Barros, Olga Soares do Rego; Lang, Ernesto Schulz; Peppe, Clovis, Synlett, 2003, # 11, p. 1725 - 1727
作者:Barros, Olga Soares do Rego、Lang, Ernesto Schulz、Peppe, Clovis、Zeni, Gilson
DOI:——
日期:——
Addition of chalcogenolate anions to terminal alkynes using microwave and solvent-free conditions: easy access to bis-organochalcogen alkenes
作者:Gelson Perin、Raquel G. Jacob、Luiz G. Dutra、Francisco de Azambuja、Greice F.F. dos Santos、Eder J. Lenardão
DOI:10.1016/j.tetlet.2005.11.158
日期:2006.2
We present here the reaction of diphenyl dichalcogenides (Se and Te) with propargyl alcohols using alumina supported sodium borohydride under solvent-free conditions. This efficient and improved method is general and furnishes the corresponding vinyl chalcogenide preferentially with a Z configuration. We also observed that when the same protocol was applied to phenyl acetylene, the (E)-bis-organochalcogen alkenes were obtained in good yields and high selectivity. The use of MW irradiation facilitates the procedure and accelerates the reaction. (c) 2005 Elsevier Ltd. All rights reserved.
TAKAHASHI, HIDETAKA;OHE, KOUICHI;UEMURA, SAKAE;SUGITA, NOBUYUKI, J. CHEM. SOC. JAP., CHEM. AND IND. CHEM.,(1987) N 7, 1508-1511