Results 31 to 40 of about 8,110 (222)
A Facile Synthesis of C-terminal Neoglycopeptides: Incorporation of Urea Moiety between Sugars and Peptides Employing Curtius Rearrangement [PDF]
, 2008 Incorporation of urea moiety in the synthesis of C-terminal neoglycopeptides has been demonstrated through the reaction between suitably protected glycosylamine and Fmoc-peptidyl isocyanates or carbamates.
Hemantha, H.P. +2 more
core +1 more source
A short synthesis of (±)-cherylline dimethyl ether
Beilstein Journal of Organic Chemistry, 2009 A synthesis of (±)-cherylline dimethyl ether is reported. The key steps involved are Michael-type addition, radical azidonation of an aldehyde, Curtius rearrangement, and reduction of an isocyanate intermediate followed by Pictet–Spengler cyclization.
Bhima Y. Kale +7 more
doaj +1 more source
Convenient Synthesis and Antimicrobial Activity of Some Novel Amino Acid Coupled Triazoles
Molecules, 2010 This study describes a promising one-pot synthesis of [2-(5-benzyl-4-phenyl-4H-[1,2,4]triazol-3-thio)-acetyl]-amino acid methyl esters 6a-h and dipeptides 10a-e, which were successfully synthesized starting from amino acid esters 5a-h, 9a-e and azides 4,
S. M. El Rayes
doaj +1 more source
Studies on the Curtius rearrangement of proline derivatives and preparation of N-carbamoyl indoline derivatives for asymmetric catalysis [PDF]
, 2022 In the synthesis of cernumidine (1) and its derivatives was previously developed in the research group, which involved the Curtius rearrangement as a key step. However, the com-pounds obtained showed some degree of racemization which was dependent on the
Alves, Diana Filipa Lopes
core
Heliyon, 2023 A novel compound N-benzyl-2-oxo-1,2-dihydrofuro [3,4-d]pyrimidine-3(4H)-carboxamide (DHFP) was synthesized by addition, rearrangement, and intramolecular cyclization reactions.
Ayşen Şuekinci Yılmaz +1 more
doaj
Angewandte Chemie, EarlyView.The use of carbon dioxide and alkenes as feedstocks for the production of carboxylic acids holds great significance in sustainable chemistry. Herein, we introduce a simple and unifying nickel‐catalyzed radical hydrocarboxylation for both functionalized and unactivated alkenes at proximal and remote sites.
Rong‐De He, Yixin Lu
wiley +2 more sources
The Distribution of Molecular Water in the Lunar South Polar Region based upon 6-micron Spectroscopic Imaging [PDF]
arXiv, 2023 The amount and distribution of water on the lunar surface are related to the input and production of water by solar wind and meteoroid bombardment, balanced by photodestruction and mobility across the surface. Using the Stratospheric Observatory for Infrared Astronomy (SOFIA), we imaged the 6.1 micron feature that uniquely traces molecular water ...
arxiv
The Thermal and Photolytic Rearrangements of Isatoic Acid Diazide [PDF]
, 1974 The primary objective of this research has been the thermolysis and photolysis of isatoic acid diazide 1. Thermolysis in low boiling solvents produced the acylazido benzimidazolone 10, while refluxing in high boiling solvents gave rise to the ...
Ciereszko, Ana Alejandre
core +2 more sources
Angewandte Chemie, EarlyView.The total synthesis of isodaphlongamine H was accomplished by a lactam strategy. This strategy started with alkylation and N‐oxidation of a readily available chiral lactam. For the key functionalization of the amide carbonyl, an iridium‐catalyzed reductive [3 + 2] cycloaddition of the N‐hydroxylactam afforded the tricyclic isoxazolidine, which was ...
Sora Iwamoto +15 more
wiley +2 more sources
Mechanochemical reactions studied by in situ Raman spectroscopy : base catalysis in liquid-assisted grinding [PDF]
, 2015 In situ Raman spectroscopy was employed to study the course of a mechanochemical nucleophilic substitution on a carbonyl group.
Biliškov, Nikola +8 more
core +1 more source