[EN] HETEROARYLDIHYDROPYRIMIDINE DERIVATIVES AND METHODS OF TREATING HEPATITIS B INFECTIONS [FR] DÉRIVÉS D'HÉTÉROARYLDIHYDROPYRIMIDINE ET PROCÉDÉS DE TRAITEMENT D'INFECTIONS PAR LE VIRUS DE L'HÉPATITE B
A number of vicinaldibromides were debrominated using sodium borohydride and a catalytic amount of bis(2-thienyl)ditelluride.
使用硼氢化钠和催化量的双(2-噻吩基)二碲化物将许多邻位二溴化物脱溴。
The stereochemistry of phosphine-induced debromination reactions
作者:C. J. Devlin、Brian J. Walker
DOI:10.1039/p19720001249
日期:——
The stereochemistry of dehalogenation reactions with triphenylphosphine (a two-electron dehalogenating reagent) has been investigated. Both eythro-(or meso-) and threo-[or (±)-] dibromides give entirely trans-olefin, except for (±)-stilbene dibromide which gave a 36 : 65 cis–trans-mixture (the olefins formed were identified by n.m.r. spectroscopy). Authentic samples of cis-olefin in each case were shown
NAD(P)<sup>+</sup>–NAD(P)H Model. 54. Free Radical Mechanism for the Reductive Debromination of<i>vic</i>-Dibromides to Alkenes
作者:Shinro Yasui、Kaoru Nakamura、Atsuyoshi Ohno
DOI:10.1246/bcsj.58.1847
日期:1985.6
vic-Dibromides undergo reductive debromination with a model of NAD(P)H, N-benzyl-1,4-dihydronicotinamide, to afford the corresponding alkenes quantitatively. Stereochemistry of the reduction suggests that the reaction involves a free radical intermediacy.
Dichloroindium Hydride(Cl<sub>2</sub>InH): A Convenient Reagent for Stereoselective Reductionof<i>vic</i>-Dibromides to (<i>E</i>)-Alkenes
作者:Brindaban C. Ranu、Arijit Das、Alakananda Hajra
DOI:10.1055/s-2003-39165
日期:——
Dichloroindium hydride (Cl2InH) generated in situ from the combination of a catalytic amount of indium(III) chloride and sodium borohydride in acetonitrile reduces activated vic-dibromides to the corresponding (E)-alkenes in excellent yieids.