Results 71 to 80 of about 35,698 (262)

Diastereoselective Spiroannulation of Phenolic Substrates: Advances Towards the Asymmetric Formation of the Manumycin m-C7N Core Skeleton

Molecules, 2007
The asymmetric syntheses of two new spirolactones prepared in optically pure form from L-3-nitrotyrosine are described. The key step, an oxidative spiroannulation, was carried out on the optically active phenols 11a and 11b and afforded the new ...
Thomas W. Scully, Jolene S. Kwasnitza, Randy R. Spaetzel, Guy L. Plourde   +3 more
doaj   +1 more source

Synthesis and photochromic properties of a bis(diarylethene)-naphthopyran hybrid [PDF]

, 2014
The synthesis and photochromic properties of a triphotochromic molecule consisting of one naphthopyran flanked by two diarylethene units investigated by UV-Visible and NMR spectroscopies are reported.
Berthet, Jerome, Berthet, Jérôme, Cseh, Liliana, Delbaere, Stephanie, Delbaere, Stéphanie, Erko, Firealem G., Mehl, Georg H.   +6 more
core   +2 more sources

The Effect of Alkyl Substituents on the Formation and Structure of Homochiral (R*,R*)-[R₂Ga(µ-OCH(Me)CO₂R′)]₂ Species—Towards the Factors Controlling the Stereoselectivity of Dialkylgallium Alkoxides in the Ring-Opening Polymerization of rac-Lactide

Molecules
Building on our previous studies, which have demonstrated that homochiral propagating species—(R*,R*)-[Me2Ga(µ-OCH(Me)CO2R)]2—were crucial for the heteroselectivity of [Me2Ga(µ-OCH(Me)CO2Me)]2 in the ring-opening polymerization (ROP) of racemic lactide ...
Magdalena Kaźmierczak, Łukasz Dobrzycki, Maciej Dranka, Paweł Horeglad   +3 more
doaj   +1 more source

Data for isolation and properties analysis of diastereomers of a mono-substituted phosphoryl guanidine trideoxyribonucleotide

Data in Brief, 2019
This article presents new data on the properties of the diastereomers of a mono-substituted phosphoryl guanidine trideoxyribonucleotides d(TpCp*A) [1,2].
Alexander A. Lomzov, Maxim S. Kupryushkin, Andrey V. Shernyukov, Mikhail D. Nekrasov, Ilya S. Dovydenko, Dmitry A. Stetsenko, Dmitrii V. Pyshnyi   +6 more
doaj   +1 more source

Synthesis and Characterization of the Diastereomers of HHC and H4CBD

Natural Product Communications, 2023
The characterization of any compound is important in the field of chemistry. As the field of cannabinoid chemistry grows so does the need for the characterization of new cannabinoids or rare cannabinoids that gain popularity within the consumer and ...
Arianna Collins, Giovanni Ramirez, Tesfay Tesfatsion, Kyle P Ray, Scott Caudill, Westley Cruces   +5 more
doaj   +1 more source

On-resin N-methylation of cyclic peptides for discovery of orally bioavailable scaffolds. [PDF]

, 2011
Backbone N-methylation is common among peptide natural products and has a substantial impact on both the physical properties and the conformational states of cyclic peptides.
Bauman, Jonathan N, Gelev, Vladimir M, Jacobson, Matthew P, Kalgutkar, Amit S, Leung, Siegfried SF, Linington, Roger G, Liras, Spiros, Lokey, R Scott, Mathiowetz, Alan M, McEwen, Cayla M, Price, David A, Rand, Arthur C, Renzelman, Chad M, Rezai, Taha, Turner, Rushia A, White, Tina R, Zhang, Yizhong   +16 more
core   +1 more source

Dynamic Kinetic Resolution of Hetero biaryl Ketones by Zinc- Catalyzed Asymmetr ic Hydrosil ylation [PDF]

, 2019
Adiastereo- and highly enantioselective dynamic kinetic resolution (DKR) of configurationally labile hetero- biaryl ketones is described. The DKR proceeds by zinc- catalyze dhydrosilylation of the carbonyl group ,thus leading to ...
Carmona, José A., Fernández Fernández, Rosario Fátima, Hornillos, Valentín, Iglesias Sigüenza, Francisco Javier, Lassaletta, José M., López Serrano, Joaquín, Ros Lao, Abel   +6 more
core   +1 more source

diastereomers

, 2010
Citation: 'diastereomers' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.D01682 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial
openaire   +1 more source

Characterization of Hexahydrocannabinol (HHC) Diastereomers, and Hexahydrocannabidiol (H4CBD) Diastereomers Using NMR, HPLC, and GC-MS

, 2022
Abstract The characterization of any compound is important in the field of chemistry, as the field of cannabinoid chemistry grows so does the need for the characterization of new cannabinoids or rare cannabinoids that gain popularity within the consumer and research fields.
Arianna C. Collins, Giovanni A. Ramirez, Tesfay T. Tesfatsion, Kyle P. Ray, Westley Cruces   +4 more
openaire   +1 more source

Redox-mediated reactions of vinylferrocene: Toward redox auxiliaries [PDF]

, 2016
Chemical redox reactions have been exploited to transform unreactive vinylferrocene into a powerful dienophile for the Diels–Alder reaction and reactive substrate for thiol addition reactions upon conversion to its ferrocenium state.
Cooke, Graeme, Fitzpatrick, Brian, Long, De-Liang, Macgregor, Stuart A., Wiles, Alan A., Zhang, Xiaolu   +5 more
core   +1 more source