Multicatalytic Stereoselective Synthesis of Highly Substituted Alkenes by Sequential Isomerization/Cross-Coupling Reactions
作者:Ciro Romano、Clément Mazet
DOI:10.1021/jacs.8b02134
日期:2018.4.4
patterns to deliver products with high control of the newly generated C═C bond. A highlyenantioselective variant of this [Ir/Ni] sequence has been established using a chiral iridium precatalyst. A complementary [Pd/Ni] catalytic sequence has been optimized for alkenyl methyl ethers with a remote C═C bond. The final alkenes were isolated with a lower level of stereocontrol. Upon proper choice of the Grignard
Expanded scope for the iridium-catalyzed asymmetric isomerization of primary allylic alcohols using readily accessible second-generation catalysts
作者:Luca Mantilli、Clément Mazet
DOI:10.1039/b920342g
日期:——
A second generation of chiral (P,N)-iridium catalysts--readily accessible from inexpensive L-serine--displays expanded scope for the asymmetricisomerization of primaryallylicalcohols.
Efficient isomerization: The title reaction was catalyzed by the [RuCl2(S)‐tol‐binap}(R)‐dbapen}]/KOH system in ethanol at 25 °C (see scheme). A series of E‐ and Z‐configured aromatic and aliphatic allylic alcohols, including a simple primary alkyl‐substituted compound (E)‐3‐methyl‐2‐hepten‐1‐ol, were transformed into the chiral aldehydes with at least 99 % ee. dbapen=2‐dibutylamino‐1‐phenylethylamine
A Catalytic Dual Isomerization/Allylboration Sequence for the Stereoselective Construction of Congested Secondary Homoallylic Alcohols
作者:Yangbin Liu、Clément Mazet
DOI:10.1021/acs.joc.0c00565
日期:2020.4.17
homoallylboronates into (chiral) aldehydes and allylboronates, respectively. In the same flask, a chiral Brønsted acid is added next to engage the isomerization products into a stereocontrolled allylboration reaction. Structural variations have been performed on both the allylic alcohols and the homoallylboronates. This mild process affords an array of stereochemically congested and complex chiral secondary
A method for producing, in a few simple steps, a specific optically active aldehyde represented by the general formula (1), in which * is an asymmetric carbon atom, includes asymmetrically isomerizing a specific allyl alcohol represented by the general formula (2) in the presence of a ruthenium complex and a base.