Vinylic chalcogenides were synthesized stereospecifically by hydrochalcogenation of propargylic amines or alcohols mediated by cerium(III) chloride. The products were obtained in good yields and with high regio- and stereoselectivities. cerium chloride - vinylic chalcogenides - hydrochalcogenation - selenium - tellurium
Ni(II)- and Co(II)-phosphine complex catalyzed carboncarbon bond formation between organic tellurides and grignard reagents
作者:Sakae Uemura、Shin-ichi Fukuzawa
DOI:10.1016/s0040-4039(00)87054-9
日期:1982.1
5H-1,2-oxatelluroles and their benzo analogs: Synthesis and reactions
作者:I. D. Sadekov、A. A. Maksimenko、A. V. Zakharov、B. B. Rivkin
DOI:10.1007/bf01165022
日期:1994.2
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.
OHE, KOUCHI;TAKAHASHI, HIDETAKA;UEMURA, SAKAE;SUGITA, NOBUYUKI, J. ORG. CHEM., 52,(1987) N 22, 4859-4863