[reaction: see text] An efficient oxidative lactonization of 1,4-diols in acetone is accomplished by the well-defined ruthenium catalyst, whose bifunctional nature underlies the high efficiency as well as unique chemo- and regioselectivity of the reaction which provides a rapid access to gamma-butyrolactones including flavor lactones hinokinin, and muricatacin.
The invention relates to compounds of formula (I) wherein U, V, W, X, R1, R2, R3, R4, R5, R6, A, B, D, E, G, m, and n are as defined in the description, to pharmaceutically acceptable salts of such compounds for use in the manufacture of a medicament for the prevention or treatment of a bacterial infection. Certain compounds of formula (I) are new and are also part of this invention.
[EN] NOVEL SIGMA-2 RECEPTOR BINDERS AND THEIR METHOD OF USE<br/>[FR] NOUVEAUX LIANTS DES RÉCEPTEURS SIGMA 2 ET LEUR PROCÉDÉ D'UTILISATION
申请人:TEMPLE UNIVERSITY-OF THE COMMONWEALTH SYSTEM OF HIGHER EDUCATION
公开号:WO2016183150A1
公开(公告)日:2016-11-17
Pharmaceutical compositions of the invention comprise functionalized lactone derivatives having a disease-modifying action in the treatment of diseases associated with dysregulation of sigma-2 receptor activity.
Radical addition of 2-iodoalkanamide or 2-iodoalkanoic acid to alkenols using a water-soluble radical initiator in water. A facile synthesis of γ-lactones
of 2-iodoacetamide and 5-hexen-1-ol in water at 75 °C in the presence of a water-soluble radical initiator, 4,4′-azobis(4-cyanopentanoic acid), provided γ-(4-hydroxybutyl)-γ-lactone in 95% yield. The use of 2-iodoacetic acid in place of 2-iodoacetamide also gave the same γ-lactone in 93 % yield.
Radical Addition of 2-Iodoalkanamide or 2-Iodoalkanoic Acid to Alkenes with a Water-Soluble Radical Initiator in Aqueous Media: Facile Synthesis of<i>γ</i>-Lactones
Radical reactions in water or aqueous ethanol using a water-soluble radical initiator are described. Heating a mixture of 2-iodoacetamide and 5-hexen-1-ol in water at 75 °C in the presence of a water-soluble radical initiator, 4,4′-azobis(4-cyanopentanoic acid), afforded 5-(4-hydroxybutyl)dihydrofuran-2(3H)-one in 95% yield. The use of 2-iodoacetic acid in place of 2-iodoacetamide also gave the same γ-lactone in 93% yield. The reaction of 2-iodoacetamide with 1-octene in aqueous ethanol was initiated by 2,2′-azobis(2-methylpropanamidine) dihydrochloride to provide γ-decanolactone. Employing water as a solvent is crucial to obtain lactone in satisfactory yield.