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
Highly Regio- and Enantioselective Catalytic Hydrogenation of Enamides in Conjugated Diene Systems: Synthesis and Application of γ,δ-Unsaturated Amino Acids
作者:Mark J. Burk、John G. Allen、William F. Kiesman
DOI:10.1021/ja9731074
日期:1998.2.1
efficient method has been found for the catalytic asymmetric hydrogenation of conjugated α,γ-dienamide esters using the Et-DuPHOS-Rh catalyst system. α,γ-Dienamide ester substrates were prepared via the Suzuki cross-coupling reaction and the Horner−Emmons olefination. Full conversion to the corresponding γ,δ-unsaturated amino acids with very high regio- and enantioselectivity was achieved after short reaction
[EN] METHODS FOR THE SYNTHESIS OF ALKYNE-CONTAINING DICARBA BRIDGES IN PEPTIDES<br/>[FR] PROCÉDÉS DE SYNTHÈSE DE PONTS DICARBA CONTENANT DES ALCYNES DANS DES PEPTIDES
申请人:UNIV MONASH
公开号:WO2011146974A1
公开(公告)日:2011-12-01
The present invention relates to methods for forming alkyne-containing dicarba bridges in peptides or between amino acids. This involves the use of a pair of complementary alkyne-containing metathesisable groups on the peptide(s) or amino acids, and subjecting the compound(s) to alkyne-metathesis. The alkyne-containing dicarba bridge may also be subjected to selective semi-hydrogenation, either directly or indirectly, to result in the formation of a product which is enriched in either the cis- or trans-alkene isomer.