Results 81 to 90 of about 48,499 (273)
Molecules, 2019 The [3 + 2] cycloaddition (32CA) reaction of an α-santonin derivative, which has an exocyclic C⁻C double bond, with p-bromophenyl nitrile oxide yielding only one spiroisoxazoline, has been studied within the molecular electron density theory ...
Luis R. Domingo +2 more
doaj +1 more source
Aziridine-Metathesis based Approaches to Alkaloid Synthesis [PDF]
, 2009 The aim of the project is to synthesise (-)-morphine utilising aziridine and metathesischemistry. The thesis is divided into three chapters.Chapter 1 provides brief reviews on the subjects of total synthesis of morphine; ringrearrangementmetathesis (RRM)
Lu, Pengfei, Lu, Pengfei
core
Regioselective synthesis of polygamma (γ) acid
RSC Advances, 2015 The oxidative polymerization of 6-amino-4-hydroxy-2-naphthalenesulfonic acid was carried out in an aqueous alkaline medium. The polymer showed uncommon multicolored emission behavior in DMSO, emitting blue, green, and yellow light at 405, 480, and 532 nm, respectively.
Dogan, Fatih +2 more
openaire +4 more sources
Catalytic Hydrothiolation: Counterion-Controlled Regioselectivity [PDF]
Journal of the American Chemical Society, 2019 In this Article, we expand upon the catalytic hydrothiolation of 1,3-dienes to afford either allylic or homoallylic sulfides with high regiocontrol. Mechanistic studies support a pathway in which regioselectivity is dictated by the choice of counterion associated with the Rh center.
Xiao-Hui Yang +5 more
openaire +4 more sources
Molecules, 2016 The enzymatic regioselective monopalmitoylation of racemic 9-(2,3-dihydroxypropyl)- adenine (DHPA), an approved antiviral agent, has been performed by an immobilized form of Candida antarctica B lipase (CAL-B) using a 4:1 DMF/hexane mixture as the ...
Jana Brabcová +5 more
doaj +1 more source
Chemoenzymatic elaboration of monosaccharides using engineered cytochrome P450_(BM3) demethylases [PDF]
, 2009 Polysaccharides comprise an extremely important class of biopolymers that play critical roles in a wide range of biological processes, but the synthesis of these compounds is challenging because of their complex structures.
Arnold, Frances H. +8 more
core +1 more source
Gold(I)-catalysed one-pot synthesis of chromans using allylic alcohols and phenols [PDF]
, 2013 A gold(I)-catalysed reaction of allylic alcohols and phenols produces chromans regioselectively via a one-pot Friedel–Crafts allylation/intramolecular hydroalkoxylation sequence.
Barker, Graeme +3 more
core +2 more sources
Molecules, 2014 Chlorinated ethenes are prevalent groundwater contaminants. To better constrain (bio)chemical reaction mechanisms of reductive dechlorination, the position-specificity of reductive trichloroethene (TCE) dehalogenation was investigated.
Stefan Cretnik +4 more
doaj +1 more source
Molecules, 2016 A novel selective and substrate-dependent synthetic protocol has been developed towards the synthesis of various fluorine-containing, highly functionalized cycloalkane derivatives.
Attila Márió Remete +4 more
doaj +1 more source
Development of a Novel Epoxide-Containing Trimethylenemethane Precursor for Palladium-Catalyzed Cycloadditions [PDF]
, 2019 Pd(0)-catalyzed trimethylenemethane (TMM) cycloaddition reactions have been used extensively to generate disubstituted 5-membered rings with high levels of regioselectivity, chemoselectivity, and stereoselectivity.
Paterson, Mara
core +2 more sources