Visible‐Light‐Mediated Stereoselective 1,2‐Iodoalkylation of Alkynes
作者:Jie‐Jie Liu、Ling Lan、Yu‐Ting Gao、Qi Liu、Liang Cheng、Dong Wang、Li Liu
DOI:10.1002/adsc.201801636
日期:2019.3.15
visible‐light‐mediated and photocatalyst/initiator‐free addition to alkynes has been developed. An atom transfer radical addition (ATRA) mechanistic afforded a broad scope of valuable iodo‐substituted alkenyl derivatives with high E/Z‐selectivities, which are versatile intermediates for the synthesis of various tri‐ and tetra‐ substituted alkenes.
[EN] DIFLUOROMETHYLATION OF UNSATURATED COMPOUNDS<br/>[FR] DIFLUOROMÉTHYLATION DE COMPOSÉS INSATURÉS
申请人:SCRIPPS RESEARCH INST
公开号:WO2013082028A1
公开(公告)日:2013-06-06
A reagent for carrying out a difluoromethylation reaction of unsaturated compounds and ring-nitrogen-containing aromatic compounds, a zinc difluoro-methanesulfinate, as well as a method for making the reagent and a method for its use are disclosed.
Transfer Hydrogenation of Activated CC Bonds Catalyzed by Ruthenium Amido Complexes: Reaction Scope, Limitation, and Enantioselectivity
作者:Dong Xue、Ying-Chun Chen、Xin Cui、Qi-Wei Wang、Jin Zhu、Jin-Gen Deng
DOI:10.1021/jo0478205
日期:2005.4.1
diamine−Ru(II)−(arene) systems was investigated to explore the asymmetric transfer hydrogenation of prochiral α,α-dicyanoolefins. Two parameters had been systematically studied, (i) the structure of the N-sulfonylated chiral diamine ligands, in which several chiral diamines substituted on the benzene ring of DPEN were first reported, and (ii) the structure of the metal precursors, and high enantioselectivitiy (up to
Enhanced Biocatalytic Performance of Bacterial Laccase from<i>Streptomyces sviceus</i>: Application in the Michael Addition Sequence Towards 3-Arylated 4-Oxochromanes
作者:Sanel Suljić、Frederik B. Mortzfeld、Matthias Gunne、Vlada B. Urlacher、Jörg Pietruszka
DOI:10.1002/cctc.201500142
日期:2015.4.20
A fast and efficient laccase‐catalysed oxidation/Michaeladditionsequence is performed using the bacteriallaccase Ssl 1 from Streptomyces sviceus under basic conditions to provide a new class of 3‐arylated 4‐oxochromanes. This approach has advantages compared to previous biocatalytic arylation protocols that use fungal laccases under slightly acidic conditions to allow a significant decrease in reaction
Carboxylic acid derivatives, medicaments comprising these compounds, their use and processes for their production
申请人:Boehringer Ingelheim Pharma KG
公开号:US20030055263A1
公开(公告)日:2003-03-20
The present application relates to the use of the carboxylic acid derivatives of general formula
R
1
—A—B—R
2
(I)
wherein
R
1
, R
2
, A and B are defined as in claim
1
, the isomers and the salts thereof, particularly the physiologically acceptable salts thereof, which have an inhibitory effect on telomerase, processes for the preparation thereof, pharmaceutical compositions containing these compounds and the use thereof as well as the preparation thereof.