Michael Addition with an Olefinic Pyridine: Organometallic Nucleophiles and Carbon Electrophiles
作者:Michael R. Stentzel、Douglas A. Klumpp
DOI:10.1021/acs.joc.0c00823
日期:2020.10.2
The conjugate addition reactions of trans-1,2-di(2-pyridyl)ethylene have been studied. This substrate reacts with organolithium nucleophiles, and the resulting anionic intermediates may be trapped by proton or various carbonyl-based electrophiles. It is suggested that the dipyridyl structure stabilizes the intermediate carbanion, allowing the Michael adduct to be captured by an added electrophile.
Amphiphilic triblock copolymers comprising poly(2-vinylpyridine) block and poly(alkyl isocyanate) block, and the preparation method thereof
申请人:Lee Jae-Suk
公开号:US20070060705A1
公开(公告)日:2007-03-15
The present invention relates to an amphiphilic triblock copolymer comprising a poly(2-vinylpyridine) block and a poly(alkylisocyanate) block and the preparation method thereof, and particularly relates to an amphiphilic triblock copolymer comprising a coil-shaped hydrophilic poly(2-vinylpyridine) block and a rod-shaped lipophilic poly(alkylisocyanate) block, having a controlled structure of coil-rod-coil or rod-coil-rod, and the preparation method thereof.