[EN] 4(SPIROPIPERIDINYL)METHYL SUBSTITUTED PYRROLIDINES AS MODULATORS OF CHEMOKINE RECEPTOR ACTIVITY<br/>[FR] 4(SPIROPIPERIDINYL)METHYL PYRROLIDINES SUBSTITUEES SERVANT DE MODULATEURS DE L'ACTIVITE DES RECEPTEURS DES CHIMIOKINES
申请人:MERCK & CO INC
公开号:WO2004058763A1
公开(公告)日:2004-07-15
3-Substituted pyrrolidines having a spiropiperidinylmethyl substituent on the 4-position of the ring are useful as modulators of chemokine receptor activity. In particular, these compounds are useful as modulators of the chemokine receptors CCR-3 and/or CCR-5.
enantioselective synthesis of highly functionalized chiral cyclopent-2-enones by the reaction of alkynyl malonate esters with arylboronic acids is described. These desymmetrizing arylative cyclizations are catalyzed by a chiral phosphinooxazoline/nickel complex, and cyclization is enabled by the reversible E/Z isomerization of alkenylnickel species. The general methodology is also applicable to the synthesis of
An Atom-Economic and Selective Ruthenium-Catalyzed Redox Isomerization of Propargylic Alcohols. An Efficient Strategy for the Synthesis of Leukotrienes
作者:Barry M. Trost、Robert C. Livingston
DOI:10.1021/ja804105m
日期:2008.9.10
secondary propargylicalcohols in good yields to provide trans enals and enones exclusively. Readily available indenylbis(triphenylphosphine)ruthenium chloride, in the presence of indium triflate and camphorsulfonic acid, gives the best turnover numbers and reactivity with the broadest range of substrates. Deuterium labeling experiments suggest that the process occurs through propargylic hydride migration