Metal-Free Hydrogenation of Electron-Poor Allenes and Alkenes
作者:Blanca Inés、David Palomas、Sigrid Holle、Sebastian Steinberg、Juan A. Nicasio、Manuel Alcarazo
DOI:10.1002/anie.201205348
日期:2012.12.3
The poorer, the better: A metal‐free catalytic procedure for the reduction of electron‐poor allenes and alkenes has been developed. The method employs a frustrated Lewis pair based catalyst. 1,4‐Diazabicyclo[2.2.2]octane (DABCO)/B(C6F5)3 was shown to be the best combination in optimization studies.
越差越好:已开发出一种用于减少电子贫乏的烯和烯烃的无金属催化方法。该方法使用沮丧的路易斯对基催化剂。1,4-二氮杂双环[2.2.2]辛烷(DABCO)/ B(C 6 F 5)3被证明是优化研究的最佳组合。
Reaction of Olefins with α-Cyanoacetamide in the Presence of Manganese(III) Acetate
作者:Hidehiko Sato、Hiroshi Nishino、Kazu Kurosawa
DOI:10.1246/bcsj.60.1753
日期:1987.5
4-chlorophenyl-substituted olefins with α-cyanoacetamide in the presence of manganese(III) acetate. On the other hand, aryl substituted olefins having electron-donating groups are oxidized under similar reaction conditions to give 1,5-dihydro-2H-pyrrol-2-ones and 3-ethenyl-2-pyrrolidones. All these reactions also produce glycols or ketones which are given by the directoxidation of these olefins with manganese(III)
Photoredox streamlines electrocatalysis: photoelectrosynthesis of polycyclic pyrimidin-4-ones through carbocyclization of unactivated alkenes with malonates
base hybrid system for the synthesis of polycyclic pyrimidin-4-ones through dehydrogenative carbocyclization of unactivated alkenes with simple malonates under very mild and external-oxidant-free conditions. The reaction exhibits a good functional-group tolerance and is amenable for a gram-scale synthesis, and the sunlight could serve as the light source. Mechanistic studies suggest that the synergistic
Stereoselective synthesis of β,γ-Unsaturated esters enabled by photocatalytic Alkyl-Heck-Type reactions
作者:Sheng-Ping Liu、Yan-Hong He、Zhi Guan
DOI:10.1016/j.jcat.2024.115646
日期:2024.9
The synthesis of β,γ-unsaturated esters is achieved via a photocatalytic reaction involving α-bromoesters and alkenes. The stereochemical configuration of the products can be manipulated by adjusting the solvent. The use of dichloromethane as a solvent yields the isomers, while tetrahydrofuran enables the formation of the isomers through a synergistic interplay of single electron transfer and energy