Increased Emulsion Stability for Reverse Y-Shaped Sugar-Based Surfactants
作者:Tammar Hussein Ali、Hairul Anuar Bin Tajuddin、Rusnah Syahila Duali Hussen、Thorsten Heidelberg
DOI:10.1007/s11743-015-1710-x
日期:2015.9
A series of reverse Y‐shaped surfactants containing aromatic and aliphatic linkers to combine two short hydrocarbon chains and one carbohydrate head group was prepared. Liquid crystalline behavior, air–water interfacial properties, and efficiency as an emulsifier was investigated for each reverse Y‐shaped surfactant. All reverse Y‐shaped surfactants mediated higher emulsionstabilities for water‐in‐oil
Zinc(II)-Catalyzed Redox Cross-Dehydrogenative Coupling of Propargylic Amines and Terminal Alkynes for Synthesis of <i>N</i>-Tethered 1,6-Enynes
作者:Tsuyuka Sugiishi、Hiroyuki Nakamura
DOI:10.1021/ja211092q
日期:2012.2.8
The zinc(II)-catalyzed redox cross-dehydrogenative coupling (CDC) of propargylic amines and terminal alkynes proceeds to afford N-tethered 1,6-enynes. In the current CDC reaction, a C(sp)-C(sp(3)) bond is formed between the carbon adjacent to the nitrogen atom in the propargylic amine and the terminal carbon of the alkyne with reduction of the C-C triple bond of the propargylic amine, which acts as an internal oxidant.