Evaluation of endo- and exo-aryl-substitutions and central scaffold modifications on diphenyl substituted alkanes as 5-lipoxygenase activating protein inhibitors
摘要:
A search for a suitable replacement for the central norbornyl scaffold presented in the recently disclosed novel FLAP inhibitors is herein described, as well as the SAR study performed on the endo and exo-aryl groups. (C) 2012 Elsevier Ltd. All rights reserved.
Generation of Aryl and Heteroaryl Magnesium Reagents in Toluene by Br/Mg or Cl/Mg Exchange
作者:Dorothée S. Ziegler、Konstantin Karaghiosoff、Paul Knochel
DOI:10.1002/anie.201802123
日期:2018.5.28
very fast Br/Mgexchange with aryl and heteroaryl bromides, producing aryl and heteroaryl magnesium alkoxides (ArMgOR⋅LiOR) in toluene. These Grignard reagents react with a broad range of electrophiles, including aldehydes, ketones, allyl bromides, acyl chlorides, epoxides, and aziridines, in good yields. Remarkably, the related reagent sBu2Mg⋅2 LiOR (R=2‐ethylhexyl) undergoes Cl/Mgexchange with various
The in situ prepared three component system [RhCl(COD)]2/imidazolidinium salts (2, 4) and KOBut catalyses the addition of phenylboronicacid to sterically hindered aldehydes affording the corresponding arylated secondary alcohols in good yields. Four novel 1,3-dialkylimidazolidinium (2-4) salts as NHC precursors were synthesized from N,N′-dialkylethylenediamine.
Hydrocarbon-Soluble Halogen and Thiolate/Magnesium Exchange Reagents
申请人:ALBEMARLE GERMANY GMBH
公开号:US20200239496A1
公开(公告)日:2020-07-30
The invention relates to hydrocarbon-soluble halogen or thiolate/magnesium exchange reagents of the general formula
R
1
MgR
1
1−n
(OR
3
)
n
·LiOR2·(1−n)LiOR
3
·aDonor
in which: R
1
is a C1-C8 alkyl and OR
2
as well as OR
3
are same or different and represent primary, secondary, or tertiary alkoxide residues having 3 to 18 carbon atoms, wherein R
2
and/or R
3
can for their part contain an alkoxy substituent OR
4
; a assumes a value of 0 to 2, n assumes a value between 0 and 1, and the donor is an organic molecule containing at least 2 nitrogen atoms.
[reaction: see text] Electrochemical arylation of arenecarboxaldehydes using an iron sacrificial anode in the presence of chromium and nickel catalysts afforded the corresponding arylated secondary alcohols in moderate to good yields. The chromium and nickel salts as catalysts are obtained by oxidation of a stainless steel rod during a preelectrolysis in 7% and 3%, respectively. The process was also
Triflimide-catalyzed allylsilane annulations of benzylic alcohols for the divergent synthesis of indanes and tetralins
作者:Jordan C. T. Reddel、Weiwei Wang、Kalli Koukounas、Regan J. Thomson
DOI:10.1039/c6sc04762a
日期:——
development of a triflimide-catalyzed annulation of benzylic alcohols with allylsilanes for the synthesis of indane or tetralin structures is reported. In this fragment coupling reaction, complexity is built rapidly from readily available starting materials to yield diverse sets of products with up to three contiguous stereocenters. Indanes or tetralins can be generated from common precursors depending