A stereocontrolled vinyl triflate-based synthetic route has been used to prepare four analogues of farnesyl diphosphate (FPP) where the terminal isoprene units have been replaced with aromatic moieties. Two of these analogues exhibit no productive interaction with protein farnesyltransferase, but the 2-naphthyl derivative 2 is a modest inhibitor of the enzyme, and the para-biphenyl derivative 4 is a surprisingly effective alternative substrate. (C) 2002 Elsevier Science Ltd. All rights reserved.
High-Pressure Diels−Alder Approach to Natural Kainic Acid
作者:Sushil K. Pandey、Arturo Orellana、Andrew E. Greene、Jean-François Poisson
DOI:10.1021/ol062419l
日期:2006.11.1
The first Diels-Alder based synthesis of (-)-kainic acid is described. Danishefsky's diene and a vinylogous malonate derived from 4-hydroxyproline combine under high pressure to afford a key bicyclic intermediate with virtually no loss of enantiopurity. This adduct can be converted into the natural product with complete stereocontrol. [reaction: see text].
Synthesis and biological activity of high-affinity retinoic acid receptor antagonists
作者:Alan T. Johnson、Liming Wang、Andrew M. Standeven、Maria Escobar、Roshantha A.S. Chandraratna
DOI:10.1016/s0968-0896(99)00055-3
日期:1999.7
This article reports the synthesis and biological activity of new high affinity retinioic acidreceptor (RAR) antagonists. The effect of introducing heteroatoms in the bicyclic ring system of the potent dihydronaphthalene RAR antagonist 8, and the variation of the pendant aromatic group on the ability of these compounds to function as RAR antagonists is discussed. The use of binding, transcriptional
Synthesis of a novel C2-aryl substituted 1,2-unsaturated pyrrolobenzodiazepine
作者:Gyoung-Dong Kang、Philip W. Howard、David E. Thurston
DOI:10.1039/b303274d
日期:——
A novel C2-aryl 1,2-unsaturated PBD (14) has been prepared via an enol triflate intermediate (8). The regiochemistry of triflation is dependent upon the point at which the reaction is performed during the synthetic route.
Total Synthesis of (±)-Cytisine via the Intramolecular Heck Cyclization of Activated <i>N</i>-Alkyl Glutarimides
作者:Jotham W. Coe
DOI:10.1021/ol006765t
日期:2000.12.1
[reaction:see text] A synthesis of racemic cytisine 1 has been developed utilizing an intramolecularHeckcyclization to prepare the bridged tricyclic intermediate 2. The cyclization employs activated glutarimide-derived ketene aminals 3 (X = P(O)OEt(2) or SO(2)CF(3)) and represents the first use of such intermediates in metal-catalyzed processes.