[EN] HIGHLY Z-SELECTIVE AND ENANTIOSELECTIVE RING OPENING/CROSS METATHESIS<br/>[FR] MÉTATHÈSE PAR OUVERTURE DE CYCLE/MÉTATHÈSE CROISÉE HAUTEMENT SÉLECTIVE ET ÉNANTIOSÉLECTIVE POUR Z
申请人:CALIFORNIA INST OF TECHN
公开号:WO2014186631A1
公开(公告)日:2014-11-20
This invention relates generally to enantiomerically enriched C-H activated ruthenium olefin metathesis catalyst compounds which are stereogenic at ruthenium, to the preparation of such compounds, and the use of such catalysts in the metathesis of olefins and olefin compounds, more particularly, in the use of such catalysts in enantio- and Z-selective olefin metathesis reactions. The invention has utility in the fields of catalysis, organic synthesis, polymer chemistry, and industrial and fine chemicals chemistry.
Catalytic, Enantioselective Synthesis of 1,2-<i>anti</i>-Diols by Asymmetric Ring-Opening/Cross-Metathesis
作者:John Hartung、Robert H. Grubbs
DOI:10.1002/anie.201310767
日期:2014.4.7
developed. A cyclometalated chiral‐at‐ruthenium complexcatalyzes the asymmetricring‐opening/cross‐metathesis of dioxygenated cyclobutenes, thus resulting in functionally rich synthetic building blocks. Syntheses of the insect pheromone (+)‐endo‐brevicomin and monosaccharide ribose demonstrate the synthetic utility of the 1,2‐anti‐diol fragments generated in the title reaction.
开发了一种合成 1,2-抗二醇的对映选择性方法。环金属化手性钌络合物催化双氧环丁烯的不对称开环/交叉复分解,从而产生功能丰富的合成结构单元。昆虫信息素 (+)- end -brevicomin 和单糖核糖的合成证明了标题反应中生成的 1,2- anti -diol 片段的合成效用。
Enol Ethers as Substrates for Efficient<i>Z</i>- and Enantioselective Ring-Opening/Cross-Metathesis Reactions Promoted by Stereogenic-at-Mo Complexes: Utility in Chemical Synthesis and Mechanistic Attributes
作者:Miao Yu、Ismail Ibrahem、Masayuki Hasegawa、Richard R. Schrock、Amir H. Hoveyda
DOI:10.1021/ja210946z
日期:2012.2.8
>99:1 enantiomeric ratio (er) with the disubstituted enolether generated in >90% Z selectivity. The enolether of the enantiomerically enriched products can be easily differentiated from the terminal alkene through a number of functionalization procedures that lead to the formation of useful intermediates for chemical synthesis (e.g., efficient acid hydrolysis to afford the enantiomerically enriched