are usually not compatible with tethered nucleophiles, except for indoles and aromatic rings which have already been reported. This paper describes the comprehensive study of intramolecular addition of silyl enol ethers, allylsilanes, and enamines to chemoselectively activated formamides, aliphatic amides, and lactams. Good to excellent yields were obtained for the 5-exo, 6-exo, and 6-endo modes of cyclization
Practical, high-yield, regioselective, rhodium-catalyzed hydroformylation of functionalized .alpha.-olefins
作者:Gregory D. Cuny、Stephen L. Buchwald
DOI:10.1021/ja00058a079
日期:1993.3
Ruthenium-Catalyzed Highly Chemoselective Hydrogenation of Aldehydes
作者:Lucia Bonomo、Laurent Kermorvan、Philippe Dupau
DOI:10.1002/cctc.201500006
日期:2015.3
[dppe=1,2‐bis(diphenylphosphino)ethane] complex underbase‐free conditions allowed highly efficient and selective hydrogenation of aldehydes in the presence of ketones in addition to olefins. Even in the case of highly sensitive 1,6‐ketoaldehydes, the desired ketoalcohols were obtained in high yields with 94–99 % overall selectivity at complete aldehyde conversion with a TON up to 30 000. The lack of requirement
在无碱条件下使用[(乙二胺)(dppe)Ru(OCO t Bu)2 ] [dppe = 1,2-双(二苯基膦基)乙烷]配合物可以在存在下列条件的情况下对醛进行高效和选择性的加氢除烯烃外的酮。即使在高度敏感的1,6-酮醛的情况下,也可以在高醛的情况下以高达30000 TON的总醛转化率获得高产率,94-99%的总选择性的酮醇。对强碱性助催化剂的需求不足极性溶剂和质子传递溶剂还可以有效且高度化学选择性地还原带有其他官能团的醛,例如环氧化物,羧酸,酯,酰胺和腈,从而强调了催化剂的潜在合成用途。