Asymmetric Hydrogenation of α,β-Unsaturated Carboxylic Esters with Chiral Iridium N,P Ligand Complexes
作者:David H. Woodmansee、Marc-André Müller、Lars Tröndlin、Esther Hörmann、Andreas Pfaltz
DOI:10.1002/chem.201202397
日期:2012.10.22
Enantioselective conjugate reduction of a wide range of α,β‐unsaturated carboxylicesters was achieved using chiral Ir N,P complexes as hydrogenation catalysts. Depending on the substitution pattern of the substrate, different ligands perform best. α,β‐Unsaturated carboxylicesters substituted at the α position are less problematic substrates than originally anticipated and in some cases α‐substituted
A Straightforward Synthesis of Polyketides via Ester Dienolate Matteson Homologation
作者:Oliver Andler、Uli Kazmaier
DOI:10.1002/chem.202004650
日期:2021.1.13
for the stereoselective synthesis of highly substituted α,β‐unsaturated δ‐hydroxy carboxyl acids, structural motifs widespread found in polyketide natural products. The protocol is rather flexible and permits the introduction of substituents and functionalities also at those positions which are not accessible by the commonly used aldol reaction. Therefore, this ester dienolate Matteson approach is an
Davies Stephen G., Ichihara Osamu, Walters Iain A. S., J. Chem. Soc. Perkin. Trans. 1, (1994) N 9, S 1141- 1147
作者:Davies Stephen G., Ichihara Osamu, Walters Iain A. S.
DOI:——
日期:——
AGENTS AND METHODS FOR THE TEMPORARY SHAPING OF KERATIN-CONTAINING FIBERS
申请人:HENKEL AG & CO. KGAA
公开号:US20170340547A1
公开(公告)日:2017-11-30
The disclosure relates to a cosmetic product, comprising a) a cosmetic preparation, containing, in relation to its total weight, a
1
) 60 to 98 wt. % of at least one polar solvent; a2) 0.1 to 20 wt. % of at least one copolymer from i) styrene ii) methacrylic acid iii) and optionally other monomers; b) a device for flash evaporation of the cosmetic preparation a), and to a method using corresponding products and to the use of the cosmetic preparation a) as process material in a device for flash evaporation.