Diastereoselective Nickel-Catalyzed Reductive Aldol Cyclizations Using Diethylzinc as the Stoichiometric Reductant: Scope and Mechanistic Insight
作者:Pekka M. Joensuu、Gordon J. Murray、Euan. A. F. Fordyce、Thomas Luebbers、Hon Wai Lam
DOI:10.1021/ja0775624
日期:2008.6.1
In the presence of diethylzinc as a stoichiometric reductant, Ni(acac) 2 functions as an efficient precatalyst for the reductive aldol cyclization of alpha,beta-unsaturated carbonyl compounds tethered to a ketone electrophile through an amide or an ester linkage. The reactions are tolerant of a wide range of substitution at both alpha,beta-unsaturated carbonyl and ketone components and proceed smoothly
K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>-HFIP synergistically promoted <i>para</i>-selective sp<sup>3</sup> C–H bond diarylation of glycine esters
作者:Qingfeng Xu、Bang Li、Yujie Ma、Fei Sun、Yanan Gao、Na Ye
DOI:10.1039/c9ob02489a
日期:——
A metal-free K2S2O8-HFIP synergistically promoted Friedel–Crafts dialkylation between a glycine derivative and N-substituted aniline was developed to efficiently synthesize diarylmethane derivatives.
[EN] GAMMA SECRETASE MODULATORS<br/>[FR] MODULATEURS DE LA GAMMA-SÉCRÉTASE
申请人:SCHERING CORP
公开号:WO2009020580A1
公开(公告)日:2009-02-12
In its many embodiments, the present invention provides a novel class of heterocyclic compounds as modulators of gamma secretase, methods of preparing such compounds, pharmaceutical compositions containing one or more such compounds, methods of preparing pharmaceutical formulations comprising one or more such compounds, and methods of treatment, prevention, inhibition, or amelioration of one or more diseases associated with the central nervous system using such compounds or pharmaceutical compositions.
Enantioselective Rh(I)-Catalyzed Cyclization of Arylboron Compounds onto Ketones
作者:Darryl W. Low、Graham Pattison、Martin D. Wieczysty、Gwydion H. Churchill、Hon Wai Lam
DOI:10.1021/ol300845q
日期:2012.5.18
Rhodiumcomplexes based upon chiral sulfinamide–alkene, TADDOL-derived phosphoramidite, or diene ligands catalyzecyclizations of arylboron compounds onto ketones, generating a variety of products containing five-, six-, or seven-membered rings with good yields and high enantioselectivities.