Palladium-Catalyzed Cross-Coupling of Alkynylzincs with Allylic Electrophiles: An Efficient and Selective Synthesis of Stereo- and Regio-Defined 1,4-Enynes
Copper catalyzed regioselective coupling of allylic halides and alkynes promoted by weak inorganic bases
作者:Lothar W. Bieber、Margarete F. da Silva
DOI:10.1016/j.tetlet.2007.08.010
日期:2007.10
Allylichalides and terminal alkynes couple under CuI catalysis in DMSO or DMF solution. In most cases, sodium carbonate or bicarbonate is sufficient to promote the reaction; less reactive alkynes require catalytic amounts of DBU. Bifunctional alkynes and halides can be reacted selectively according to the stoichiometry used. Trimethylsilyl, hydroxyl, ester and halide groups are tolerated in the alkyne
Regio- and stereo-specific allylation of Grignard reagents using allylic phosphates
作者:Shuki Araki、Takashi Sato、Yasuo Butsugan
DOI:10.1039/c39820000285
日期:——
Geranyl and neryl diethyl phosphates are found to react regio- and stereo-specifically with a variety of Grignardreagents giving high yields of coupling products.