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
Palladium(II) Acetate in Pyridine as an Effective Catalyst for Highly Regioselective Hydroselenation of Alkynes
作者:Ikuyo Kamiya、Etsuyo Nishinaka、Akiya Ogawa
DOI:10.1021/jo048727j
日期:2005.1.1
A highly regioselective hydroselenation of terminal alkynes with benzeneselenol can be achieved by the combination of palladium acetate and pyridine, providing the corresponding terminal alkenes, (i.e., 2-phenylseleno-1-alkenes) as a sole product. In this hydroselenation, pyridine may act as a suitable ligand for active palladium intermediates.
SHIMIZU MAKOTO; KUWAJIMA ISAO, J. ORG. CHEM., 1980, 45, NO 20, 4063-4065