Catalyst- and Additive-Free Electrochemical CO2 Fixation into Morita–Baylis–Hillman Acetates
作者:Giulio Bertuzzi、Marco Bandini、Andrea Brunetti
DOI:10.1055/a-2029-0488
日期:——
The electrochemical carboxylation of Morita–Baylis–Hillman (MBH) acetates with CO2 is presented. The process proceeds in the absence of transition-metal catalysts and relies on the cathodic reduction of MBH acetates to generate nucleophilic anions that are able to trap low-pressure CO2. Valuable succinate derivatives are obtained (20 examples) in high yields (up to 90%) and with excellent functional
介绍了Morita–Baylis–Hillman (MBH) 乙酸盐与 CO 2的电化学羧化反应。该过程在没有过渡金属催化剂的情况下进行,并依赖于 MBH 乙酸盐的阴极还原以产生能够捕获低压 CO 2的亲核阴离子。以高产率(高达 90%)和优异的官能团耐受性获得了有价值的琥珀酸酯衍生物(20 个例子)。记录了转化的显着底物控制(电子性质)区域选择性以及基于控制实验的机械原理。
Modular 1,1′-Ferrocenediyl-cored <i>P</i>
-Stereogenic Diphosphines: ′′JDayPhos′′ Series and its Use in Rhodium(I)-Catalyzed Hydrogenation
作者:Gašper Poklukar、Michel Stephan、Barbara Mohar
DOI:10.1002/adsc.201800255
日期:2018.7.4
A novel ferrocene‐based P‐stereogenic diphospine ligand series dubbed JDayPhos was developed, which rhodium(I) complexes of some of its members exhibited excellent enantioselectivity (up to >99% ee) and high activity in asymmetric hydrogenation of β‐unsubstituted or ‐substituted itaconates and α‐methylene‐γ‐oxo‐carboxylates.