Direct conversion of carboxylic acids (C n ) to alkenes (C 2n−1 ) over titanium oxide in absence of noble metals
作者:Borja Oliver-Tomas、Michael Renz、Avelino Corma
DOI:10.1016/j.molcata.2016.01.019
日期:2016.5
Abstract Carbon carbon bond formations and deoxygenation reactions are important for biomass up-grading. The classical ketonicdecarboxylation of carboxylic acids provides symmetrical ketones with 2n + 1 carbon atoms and eliminates three oxygen atoms. Herein, this reaction is carried out with titanium oxide at 400 °C, and an olefin with 2n + 1 carbon atoms is obtained instead of the ketone. For olefin
Reactions en milieu heterogene solide-liquide faiblement hydrate : la reaction de wittig dans le systeme hydroxydes alcalins/solvant organique aprotique
作者:Yves Le Bigot、Michel Delmas、Antoine Gaset
DOI:10.1016/s0040-4020(01)85886-5
日期:1988.1
The Wittig reaction carried out in a slighty hydrated solid-liquid media constituted by a solid alkaline hydroxyde and an organic phase which includes the phosphonium salt and the aldehyde leads easily to the corresponding alkene with very good yields specially with furanic aldehydes. The ylide formation at the interface appears as the most important step of this condensation.
Transformation of triolein to biogasoline by photo-chemo-biocatalysis
作者:Weihua Xu、Kaihao Mou、Haonan Zhou、Jian Xu、Qi Wu
DOI:10.1039/d2gc01992b
日期:——
of oleic acid, photocatalytic oxidative cleavage of long-chain alkene, and the final decarboxylation of the medium- or short-chain fatty acids catalyzed by CvFAP mutant. After optimizing the reaction conditions in detail, the practicability of the method was proved by a gram-scale experiment. This protocol was successfully applied to the conversion of various long-chain unsaturated acids and long-chain
Ru-Catalyzed Decarbonylative Addition of Aliphatic Aldehydes to Terminal Alkynes
作者:Xiangyu Guo、Jun Wang、Chao-Jun Li
DOI:10.1021/ol101107w
日期:2010.7.16
A novel method for the formation of isolated C=C bonds was developed via a ruthenium-catalyzed decarbonylative addition of aliphatic aldehydes and alkynes. An unprecedented complete switch of chemoselectivity from aromatic aldehydes to aliphatic aldehydes was observed simply by using tri(2,4,6-trismethoxyphenyl)phosphine as ligand. A synthesis by this method of an insect sex pheromone was demonstrated.
Determination of oxirane ring position in epoxides at the nanogram level by reaction gas chromatography