[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
Stereospecific synthesis of the sex pheromone of the passionvine mealybug, Planococcus minor
作者:Jocelyn G. Millar
DOI:10.1016/j.tetlet.2007.11.045
日期:2008.1
short and completely stereospecificsynthesis of (E)-2-isopropyl-5-methyl-2,4-hexadienyl acetate, the very recently identified sex pheromone of the passionvine mealybug Planococcus minor, is described. In the key step, CuI-catalyzed anti-addition of a Grignard reagent to a propargyllic alcohol intermediate gave the required trisubstituted alkene with 100% regio- and stereospecificity. The stereochemical