Diastereoselectivity in the triethylamine-catalyzed sulfa-Michael addition of thiols to nitroalkenes: kinetic and thermodynamic control
作者:Jiandong Wang、Ning Chen、Jiaxi Xu
DOI:10.1016/j.tet.2015.04.053
日期:2015.6
sulfa-Michael addition of nitroalkenes and thiols was investigated. The sulfa-Michael addition is kineticcontrol at the beginning and thermodynamiccontrol at the end for less bulky reactants. Thus, kinetic and thermodynamic-controlled adducts can be obtained as major products by controlling the reaction time in those cases. Linear nitroalkenes generally produce anti-adducts as major kinetic products due
Nitroalkanes can be transformed into olefins in high yielding reactions via nitroolefins and β-nitro trithiocarbonates in radical olefination reactions.
在自由基烯烃化反应中,硝基链烷可以通过硝基烯烃和β-硝基三硫代碳酸酯在高产率的反应中转化为烯烃。
Regioselective Preparation of Diethyl 3,4-Disubstituted 1,5-Dihydro-5-oxo-2<i>H</i>-pyrrol-2-ylphosphonates and Their Coupling with Aldehydes. Application to the Synthesis of C/D-Rings Component of Phycocyanobilin
作者:Hla Ngwe、Hideki Kinoshita、Katsuhiko Inomata
DOI:10.1246/bcsj.67.3320
日期:1994.12
readily underwent the coupling reaction with various aldehydes to afford the corresponding 1,5-dihydro-5-methylene-2H-pyrrol-2-ones including pyrromethenone derivatives in good yields. A series of these reactions was successfully applied to the synthesis of C/D-rings component of phycocyanobilin.