A Palladium Nanoparticle-Nanomicelle Combination for the Stereoselective Semihydrogenation of Alkynes in Water at Room Temperature
作者:Eric D. Slack、Christopher M. Gabriel、Bruce H. Lipshutz
DOI:10.1002/anie.201407723
日期:2014.12.15
The addition of NaBH4 to Pd(OAc)2 in water containing nanomicelles leads to the generation of H2 and Pd nanoparticles. Subsequent reduction of disubstituted alkynes affords Z‐alkenes in high yields. These reactions are general, take place in water at ambient temperatures, and offer recycling of the aqueous reaction mixture along with low overall E Factors.
在含有纳米胶束的水中将NaBH 4 添加到Pd(OAc) 2导致H 2和Pd纳米颗粒的产生。随后二取代炔烃的还原以高产率提供Z-烯烃。这些反应是一般的,在环境温度下在水中发生,并且提供水性反应混合物的循环以及低的总 E 因子。
Studies on the Cu(I)-Catalyzed Regioselective <i>anti</i>-Carbometallation of Secondary Terminal Propargylic Alcohols
作者:Zhan Lu、Shengming Ma
DOI:10.1021/jo0524021
日期:2006.3.31
A highly regioselective Cu(I)-catalyzed anti-carbometallation of secondary terminal propargylicalcohols with 1° alkyl or aryl Grignard reagents affording 2-substituted allylic alcohols was developed. By using this method, optically active allylic alcohols can be prepared from the optically active propargylicalcohols without obvious loss of the enantiopurity. The cyclic organometallic intermediate
Stereoselective Preparation of Functionalized Acyclic Alkenylmagnesium Reagents Using <i>i-</i>PrMgCl·LiCl
作者:Hongjun Ren、Arkady Krasovskiy、Paul Knochel
DOI:10.1021/ol048363h
日期:2004.11.1
Functional groups such as a nitrile, chloride, iodide, and ester are readily tolerated. The conversion of an alkenyl iodide bearing a keto group to the corresponding silylated cyanohydrin allows preparation of the corresponding Grignard reagent affording, after acylation and deprotection, unsaturated1,4-diketones.