Carbon-Carbon Bond Formation Reaction Promoted by Cadmium In Aqueous Media
作者:Yunfa Zheng、Weiliang Bao、Yongmin Zhang
DOI:10.1080/00397910008087264
日期:2000.10
Abstract Promoted by metallic cadmium allylilic and propargyl bromides react smoothly with aldehydes in aqueous DMF to give homoallylic and homopropargyl alcohols in moderate to good yields. It can also promote pinacol coupling of aromaticaldehydes. The metallic cadmium is produced in situ by the reduction of CdCl2 H2O with samarium metal.
Active Antimony Mediated Reaction of<i>3</i>-Bromocyclohexene with Aldehydes
作者:Qi-Hui Jin、Ping-Da Ren、Yu-Qiong Li、Zi-Peng Yao
DOI:10.1080/00397919809458694
日期:1998.11
Active antimony in situ from reduction of SbCl3 by Zn powder mediated reaction of 3-bromocyclohexene with aldehydes. The reaction has high chemo- and good stereo- selectivity.
Diastereoselective Reaction of Aldehydes with 3-Bromocyclohexene and Tin
作者:Jing-Yao Zhou、Zhao-Gen Chen、Shi-Hui Wu
DOI:10.1080/00397919408010579
日期:1994.10
The reaction of 3-bromocyclohexene and powdered tin with aromatic aldehydes and an alkynal provides excellent erythro-selective products, while the corresponding reactions with aliphatic aldehydes proceed with moderate erythro-selectivity.
Use of Cyclic Allylic Bromides in the Zinc–Mediated Aqueous Barbier–Grignard Reaction
The zinc–mediated aqueous Barbier–Grignardreaction of cyclic allylic bromide substrates with various aldehydes and ketones to afford homoallylic alcohols was investigated. Aromatic aldehydes and ketones afforded adducts in good yields (66–90%) and with good diastereoselectivities. Non–aromatic aldehydes also reacted well under these conditions, but only poor yields were obtained with non–aromatic