Results 101 to 110 of about 17,233 (279)

Catalysis of 3-Pyrrolidinecarboxylic Acid and Related Pyrrolidine Derivatives in Enantioselective anti-Mannich-Type Reactions:  Importance of the 3-Acid Group on Pyrrolidine for Stereocontrol

, 2008
The development of enantioselective anti-selective Mannich-type reactions of aldehydes and ketones with imines catalyzed by 3-pyrrolidinecarboxylic acid and related pyrrolidine derivatives is reported in detail.
Fujie Tanaka (2329276), Maria Mifsud (2533288), Masanori Imai (2480335), Noemi Garcia-Delgado (2080084), Susumu Mitsumori (2336905), Paul Ha-Yeon Cheong (1642720), K. N. Houk (1247004), Haile Zhang (2317696), Naoto Utsumi (2423512), Carlos F. Barbas (19478), Klaus Albertshofer (1393093)   +10 more
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State‐of‐the‐Art and Synthetic Challenges for Hydrosilane Production

Chemistry – A European Journal, EarlyView.
The synthesis of hydrosilanes is currently energy intensive and their recycling is not considered. However, these compounds are important in many industrial fields but also for the valorization of oxygenated waste, towards a circular economy. This review compares the available synthetic routes and highlights the remaining challenges for the production ...
Gabriel Durin, Albane Fontaine, Jean‐Claude Berthet, Thibault Cantat   +3 more
wiley   +1 more source

A Deep Analytical Investigation of the Aroma Chemistry of Incrocio Bruni 54 and Its Differentiation from Italian White Varieties

Fermentation
Incrocio Bruni 54 is a little-known white grape variety developed in the Marche region (Italy) from a cross between Verdicchio and Sauvignon Blanc to combine aromatic freshness with structure.
Maurizio Piergiovanni, Martina Moretton, Domenico Masuero, Silvia Carlin   +3 more
doaj   +1 more source

Nova metodologia de bromação dos adutos de morita-baylishillman E sua utilização como intermediários sintéticos na Preparação de heterociclos [PDF]

, 2008
TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Físicas e Matemáticas. Curso de Química.Neste trabalho será apresentada uma nova metodologia sintética simples e eficiente para a preparação de (Z)-2-(bromometil)-2-alcenoatos a
FERREIRA, Misael
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Strain Release of 1‐Azabicyclo[1.1.0]butanes as a Gateway to Highly Functionalized Azetidines: New Strategies and Structural Motifs

Chemistry – A European Journal, EarlyView.
Over the past decade, the interest in azetidines has continuously risen, by virtue of their highly appealing pharmaceutical properties. Monocyclic, spirocyclic, and bridged azetidines can be accessed by leveraging 1‐azabicyclo[1.1.0]butanes as precursors.
Yuri Gelato, Philipp Natho, Marco Colella, Renzo Luisi   +3 more
wiley   +1 more source

Structure Elucidation and Total Synthesis of Granolides A–C: Ethyl‐branched Sesquiterpenes From the Tropical Frog Gephyromantis granulatus

Chemistry – A European Journal, EarlyView.
Males of the tropical frog Gephyromantis granulatus carry unique ethyl‐branched sesquiterpenoid macrolactones in their scent glands. Their structure elucidation was performed by GC/MS, leading to the proposed structures of the granolides. A flexible enantioselective synthesis confirmed the structures and allowed determination of their absolute ...
Johanna Kuhn, Miguel Vences, Stefan Schulz   +2 more
wiley   +1 more source

Impact of selenium-enriched Ligilactobacillus salivarius DACN818 on Zhacai: Insights from metabolomics and microbiomics

Food Chemistry: X
Selenium enrichment can modulate the metabolic activities of microorganisms, yet how such changes influence the quality characteristics of fermented foods remains poorly understood.
Qingxu Guo, Jiajing Wang, Yue Li, Yi Wu, Dejun Liu, Xiaoyong Chen   +5 more
doaj   +1 more source

O uso de 2,2,2-tricloro-1-ariletanonas como agentes benzoilantes [PDF]

, 1987
Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias Fisicas e MatematicasA preparação de diversas amidas e hidrazidas pela reação de 2,2,2-tricloro-1-ariletanona com diferentes nucleófilos demostrou ser um processo ...
Rebelo, Ricardo Andrade
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N‐Aryl Acridone Derivatives as Effective Catalysts for Energy Transfer Reactions

Chemistry – A European Journal, EarlyView.
Acridones derivatives have high triplet energy, are simple accessible, and could be used in challenging [2+2] ENT reactions. ABSTRACT Organic photocatalysts capable of promoting high‐energy triplet energy transfer (EnT) remain limited, particularly for demanding [2+2] photocycloaddition reactions.
Francesco Calogero, Gaetano D'Onghia, Federica Fina, Zakaria Ziani, Luca Sensoli, Andrea Gualandi, Andrea Fermi, Paola Ceroni, Pier Giorgio Cozzi   +8 more
wiley   +1 more source

Ampliação do índice semi-empírico topológico para Alquilbenzenos e sua aplicação em estudos de Qspr / qsrr [PDF]

, 2004
TCC (graduação) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Curso de Química.Neste estudo o Índice Semi-Empírico Topológico (IET) foi desenvolvido e otimizado com o objetivo de predizer a retenção cromatográfica de
PORTO, Ledilege Cucco
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