Highly Regioselective Palladium‐Catalyzed Carboxylation of Allylic Alcohols with CO
<sub>2</sub>
作者:Tsuyoshi Mita、Yuki Higuchi、Yoshihiro Sato
DOI:10.1002/chem.201503359
日期:2015.11.9
stoichiometric transmetalation agent under a CO2 atmosphere (1 atm). This carboxylation proceeded in a highly regioselective manner to afford branched carboxylic acids predominantly. The β,γ‐unsaturated carboxylic acid thus obtained was successfully converted into an optically active γ‐butyrolactone, a known intermediate of (R)‐baclofen.
Cross metathesis of methyl oleate (MO) with terminal, internal olefins by ruthenium catalysts: factors affecting the efficient MO conversion and the selectivity
作者:Nor Wahida Awang、Ken Tsutsumi、Barbora Huštáková、Siti Fairus M. Yusoff、Kotohiro Nomura、Bohari M. Yamin
DOI:10.1039/c6ra24200f
日期:——
(CM) reactions of methyloleate (MO) with cis-4-octene (OC), cis-stilbene (CS) using RuCl2(PCy3)(IMesH2)(CHPh) [IMesH2 = 1,3-bis(2,4,6-trimethylphenyl)imidazolin-2-ylidene; Cy = cyclohexyl] afforded CM products with high MO conversion and high selectivity under high molar (OC/MO, CS/MO) ratios; CM with cis-1,4-diacetoxy-2-butene also afforded metathesis products with high MO conversion under certain conditions
Comparison of Reactivity in the Cross Metathesis of Allyl Acetate-Derivatives with Oleochemical Compounds
作者:Arno Behr、Stephanie Toepell
DOI:10.1007/s11746-015-2614-7
日期:2015.4
The metathesis of unsaturated oleochemicals is an excellent tool for generating α,ω‐difunctional substrates, which are useful intermediates for polymer synthesis. This article describes the crossmetathesis of allyl acetate and cis‐1,4‐diacetoxy‐2‐butene with methyl 10‐undecenoate and methyl oleate, which are oleochemical key substrates. Detailed optimizations led to high conversion rates and yields
The cross-metathesis of methyl oleate with <i>cis</i>-2-butene-1,4-diyl diacetate and the influence of protecting groups
作者:Arno Behr、Jessica Pérez Gomes
DOI:10.3762/bjoc.7.1
日期:——
cross-metathesis of methyl oleate (1) with cis-2-butene-1,4-diyl diacetate (2) starting from renewable resources and quite inexpensive base chemicals. RESULTS: This cross-metathesis reaction was carried out with several phosphine and N-heterocyclic carbene ruthenium catalysts. The reaction conditions were optimised for high conversions in combination with high cross-metathesis selectivity. The influence of protecting
Metathesis of renewable raw materials—influence of ligands in the indenylidene type catalysts on self-metathesis of methyl oleate and cross-metathesis of methyl oleate with (Z)-2-butene-1,4-diol diacetate
作者:Anna Kajetanowicz、Adrian Sytniczuk、Karol Grela
DOI:10.1039/c3gc42194e
日期:——
The influence of different N-heterocyclic carbene (NHC) and other neutral ligands on the outcome of the cross-metathesis reaction of methyl oleate with (Z)-2-butene-1,4-diol diacetate and self-metathesis of methyl oleate was studied for a series of indenylidene type Ru catalysts.