Browsing by Subject "Organic chemistry"
Now showing items 1-6 of 6
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Chemoselective crossed acyloin condensations: catalyst and substrate control
(2011)The interplay between catalyst and substrate control in crossed acyloin condensation reactions has been studied. It was found that a pentafluorophenyl-substituted triazolium ion derived catalyst was capable of catalyzing ... -
Colorimetric sensing of anions in aqueous solution using a charge neutral, cleft-like, amidothiourea receptor: Tilting the balance between hydrogen bonding and deprotonation in anion recognition
(2008)The design, synthesis and physical evaluation of 1, a visible colorimetric `naked eye? pyridyl based bis-amidothiourea sensor for anions, is described. This charge neutral sensor gives rise to significant changes in the ... -
A concise synthesis of asymmetrical N,N'-disubstituted guanidines
(2011)We present a new and concise method for the preparation of asymmetrical N,N?-disubstituted guanidines starting from thiourea via the reaction of N-Boc-protected N?-alkyl/aryl substituted thioureas with an amine in the ... -
Crystallographic, 1H NMR and CD studies of sterically strained thiourea anion receptors possessing two stereogenic centres
(2009)The synthesis and structural characterisation of three chiral bis-naphthalene thiourea receptors (1?3) derived from (R)-(+)-1-(1-naphthyl)ethylamine and (S)-(?)-1-(1-naphthyl)ethylamine are reported along with spectroscopic ... -
The enantioselective benzoin condensation promoted by chiral triazolium precatalysts: stereochemical control via hydrogen bonding.
(2009)The design of a new class of triazolium ion precatalysts incorporating protic substituents is described. These materials promote the enantioselective benzoin condensation of a range of aromatic aldehydes (1?62% ee). ... -
Two-Photon Polymerization of Sugar Responsive 4D Microstructures
(2023)Stimuli-responsive hydrogels have attracted much attention owing to the versatility of their programmed response in offering intelligent solutions for biomimicry applications, such as soft robotics, tissue engineering, and ...