Direct Synthesis of an α,ω-Diester from 2,7-Octadienol as Bulk Feedstock in Three Tandem Catalytic Steps
作者:Karoline A. Ostrowski、Dennis Vogelsang、Thomas Seidensticker、Andreas J. Vorholt
DOI:10.1002/chem.201503785
日期:2016.1.26
A new tandemcatalytic process was designed and developed as a tool for the direct conversion of the widely available feedstock 2,7‐octadienol into an α,ω‐diester. This innovative auto‐tandem catalysis is atom efficient and consists of three consecutive palladium‐catalysed reactions: ether formation, ether carbonylation and alkoxycarbonylation. By using the design of experiments (DoE) approach, significant
Novel zwitterionic phosphonium alkylsulfonate ligands are chemoselectively synthesized from N-heterocyclic phosphines and cyclic sulfones in one step in good to excellent yields.
Isolated-palladium complexes for catalyzed telomerization of butadiene with methanol in the presence of water
作者:Julien Mesnager、Emile Kuntz、Catherine Pinel
DOI:10.1016/j.jorganchem.2009.04.012
日期:2009.7
In order to study the performance of organometallic complexes in the telomerization of butadiene with methanol in aqueous medium, we synthesized and characterised hydrosoluble palladium complexes. [(π-allyl)Pd(TPPTS)2]+Cl− complex exhibited strong stability as no degradation was observed after storage at room temperature under air atmosphere for weeks. TON’s up to 36 000 were achieved at 50 °C.
The present invention is related to a process for telomerizing a conjugated diene which comprises reacting said conjugated diene with a compound containing active hydrogen in the presence of a catalyst system comprising at least one transition metal compound, at least one phosphorus-containing compound, and at least one salt which forms a liquid under the conditions of the telomerization process.
By replacing one planar phenyl group of PPh3 with bulkier ferrocenyl or ruthenocenyl group, the performance of resulted metallocene-based phosphine ligand in the telomerization of 1,3-butadiene with methanol has been largely elevated compared to the widely used PPh3. High catalytic efficiency with good selectivity has been obtained under the conditions of high butadiene-to-palladium ratio, low catalyst