Rh<sup>III</sup>‐Catalyzed Oxidative Olefination of Vinylic CH Bonds: Efficient and Selective Access to Di‐unsaturated α‐Amino Acid Derivatives and Other Linear 1,3‐Butadienes
作者:Tatiana Besset、Nadine Kuhl、Frederic W. Patureau、Frank Glorius
DOI:10.1002/chem.201101340
日期:2011.6.20
get‐together! A RhIII‐catalyzedoxidative cross‐coupling of different olefins was developed, resulting in the formation of valuable linear butadiene products and especially di‐unsaturated α‐amino acid derivatives. 1,1‐Di‐, 1,2‐di‐, and 1,1,2‐trisubstituted olefins could be coupled with styrenes and acrylates. In these reactions, remarkably high levels of chemo‐, regio‐, and stereoselectivity were obtained
Conotoxin analogues and methods for synthesis of intramolecular dicarba bridge-containing peptides
申请人:Robinson Andrea
公开号:US20070197429A1
公开(公告)日:2007-08-23
According to the present invention, there is provided a range of new conotoxin derivatives and methods for synthesizing these analogues and other intramolecular dicarba bridge-containing peptides, including dicarba-disulfide bridge-containing peptides.
Methods for the synthesis of dicarba bridges in organic compounds
申请人:Robinson Andrea Jane
公开号:US09102708B2
公开(公告)日:2015-08-11
The present invention relates to methods for forming dicarba bridges in organic compounds. This involves the use of a pair of complementary metathesisable groups on the organic compound, and subjecting the compound to cross-metathesis under microwave radiation conditions. In an alternative, the compounds contain a turn-inducing group between the pair of cross-metathesisable groups to facilitate the cross-metathesis.
Highly Regio- and Enantioselective Synthesis of γ,δ-Unsaturated Amido Esters by Catalytic Hydrogenation of Conjugated Enamides
作者:Min Gao、Jing-jing Meng、Hui Lv、Xumu Zhang
DOI:10.1002/anie.201410213
日期:2015.2.2
An efficient and highly regio‐ and enantioselectivecatalytic asymmetric hydrogenation of α,γ‐dienamido esters to γ,δ‐unsaturated amidoesters has been achieved using Rh/TangPhos as the catalyst. A series of γ,δ‐unsaturated amido acids were furnished in excellent yields with up to 99 % ee. This effective methodology was applied in the asymmetric synthesis of key intermediate of Ramipril, an ACE inhibitor
A comparison of the asymmetric hydrogenation catalyzed by rhodium complexes containing chiral ligands with a binaphthyl unit and those with a 5,5′,6,6′,7,7′,8,8′-octahydro-binaphthyl unit
作者:Fu-Yao Zhang、Wai Him Kwok、Albert S.C. Chan
DOI:10.1016/s0957-4166(01)00399-8
日期:2001.9
The chiral ligands H8–BINAPO and H8–BDPAB were synthesized by reacting chlorodiphenylphosphine with H8–BINOL and H8–BINAM, respectively. Applications of these ligands in the Rh-catalyzed enantioselectivehydrogenation of a variety of (Z)-acetamido-3-arylacrylic acid methyl esters provided chiral amino acid derivatives with good to excellent enantioselectivities (H8–BINAPO: up to 84.0% e.e.; H8–BDPAB: