Results 51 to 60 of about 1,110,495 (128)

Safety and efficacy of a feed additive consisting of a tincture derived from the leaves of Ocimum basilicum L. (basil tincture) for use in all animal species (FEFANA asbl)

EFSA Journal, Volume 23, Issue 7, July 2025.
Abstract Following a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety and efficacy of a tincture from the leaves of Ocimum basilicum L. (basil tincture) when used as a sensory additive in feed and in water for drinking for all animal species. The product is a ■■■■■ solution, with a dry matter content of
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Roberto Edoardo Villa, Giovanna Azimonti, Eleftherios Bonos, Henrik Christensen, Mojca Durjava, Birgit Dusemund, Ronette Gehring, Boet Glandorf, Maryline Kouba, Marta López‐Alonso, Francesca Marcon, Carlo Nebbia, Alena Pechová, Miguel Prieto‐Maradona, Ilen Röhe, Katerina Theodoridou, Maria de Lourdes Bastos, Emilio Benfenati, Paul Brantom, Andrew Chesson, Josef Schlatter, Johannes Westendorf, Paola Manini   +23 more
wiley   +1 more source

Indium in organic synthesis: convenient synthesis of β,γ-unsaturated ketones

, 1997
A mild and efficient method for the preparation of β,γ unsaturated ketones by a simple reaction on acid chloride with allyl, crotyl, prenyl bromide and indium in DMF is described. A mild and efficient method for the preparation of β,γ unsaturated ketones
Sudershan Reddy, Gondi, Srinivas, Dale, Yadav, J. S., Hima Bindu, Konuru, Konuru Hima Bindu, J.S. Yadav, Gondi Sudershan Reddy, Dale Srinivas   +7 more
core   +1 more source

Organocatalytic Asymmetric [3 + 2]-Annulations of γ‑Sulfonamido/γ-Hydroxy-α,β-Unsaturated Ketones with Cyclic N‑Sulfimines: Synthesis of Chiral Polyheterotricyclic Imidazolidines and Oxazolidines

, 2022
The first organocatalytic asymmetric [3 + 2]-annulation of γ-sulfonamido-α,β-unsaturated ketones with cyclic N-sulfimines has been developed, and enantioenriched functionalized polyheterotricyclic imidazolidines were obtained in good yields and with ...
Seung Yeon Kim (8045240), Seung Yeon Kim, Sung-Gon Kim (1754293), Yoseop Kim, Yoseop Kim (2066719), Sung-Gon Kim   +5 more
core   +1 more source

Visible light initiated photosensitised electron transfer (PET) reductive β-activation of α,β-unsaturated ketones for radical cyclisation: a new concept in promoting radical reactions

, 1994
Photosensitised one electron reductive β-activation of α ,β -unsaturated ketones for radical cyclisations are ...
Pandey, Ganesh, Hajra, Saumen, Ghorai, Manas K.   +2 more
core   +1 more source

Diastereoselective Conversion of β-Nitro-β,γ-Unsaturated Ketones into Conjugated (E,E)-Dienones

, 2023
Herein, we report a new and stereoselective conversion of β-nitro-β,γ-unsaturated ketones into conjugated dienones, a versatile class of electron-poor alkenes, widely exploited in organic synthesis as source of highly functionalized molecules.
Ballini, R, Palmieri, A, Bassetti, B, Alessandro Palmieri, Petrini, M, Roberto Ballini, Marino Petrini, Benedetta Bassetti   +7 more
core   +1 more source

Synthesis of α-Oxygenated β,γ-Unsaturated Ketones by a Catalytic Rearrangement Strategy

, 2018
A straightforward two-step entry to α-oxgenated β,γ-unsaturated ketones from readily available α,β-unsaturated ketones is disclosed. It was found that bis(allylic) alcohols undergo a skeletal rearrangement in the presence of 1 mol% of cheap and non ...
Lempenauer, Luisa, Lemière, Gilles, Soupart, Aline, Duñach, Elisabet   +3 more
core   +1 more source

Nickel-catalysed conjugate addition of trimethylaluminium to α,β-unsaturated ketones

, 1975
Nickel acetylacetonate brings about the conjugate addition of trimethylaluminium to α,β-unsaturated ketones. The yields of β- methylated ketones range from 30% to quantitative.
EA Jeffery, A Meisters, T Mole, L Bagnell   +3 more
core   +1 more source

Synthesis of β‑Amino-α,β-unsaturated Ketone Derivatives via Sequential Rhodium-Catalyzed Sulfur Ylide Formation/Rearrangement

, 2015
In the presence of a Rh­(II) catalyst and β-(methylthio)-α,β-unsaturated ketones, 1-sulfonyl-1,2,3-triazoles can be converted into functionalized β-amino-α,β-unsaturated ketones via formation of α-imino rhodium carbene/sulfur ylide and subsequent ...
Chuan-Ying Li (1608508), Yinping Shi (1608511), Jun He (46556), Zengming Man (1608505)   +3 more
core   +1 more source

Sodium Tetraarylborates as Effective Nucleophiles in Rhodium/Diene-Catalyzed 1,4-Addition to β,β-Disubstituted α,β-Unsaturated Ketones: Catalytic Asymmetric Construction of Quaternary Carbon Stereocenters

, 2016
Sodium Tetraarylborates as Effective Nucleophiles in Rhodium/Diene-Catalyzed 1,4-Addition to β,β-Disubstituted α,β-Unsaturated Ketones: Catalytic Asymmetric Construction of Quaternary Carbon ...
Makoto Nagaosa (2264737), Takahiro Nishimura (1602646), Ryo Shintani (1797427), Yosuke Tsutsumi (1750723), Tamio Hayashi (1639762)   +4 more
core   +1 more source

A simple synthesis of γ-hydroxy-α β-unsaturated aldehydes

, 1987
A convenient method has been developed for the synthesis of γ-hydroxy-α, β- unsaturated aldehydes with one-carbon homologation from α, β-unsaturated ...
Ranu, Brindaban C., Sarkar, Dipak C.
core   +1 more source