Deprotection of benzyl and p-methoxybenzyl ethers by chlorosulfonyl isocyanate–sodium hydroxide
摘要:
CSI-NaOH procedure provided a new and mild methodology for the deprotection of benzyl and p-methoxybenzyl ethers without affecting the other functional groups under similar reaction conditions. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of the C1−C23 Fragment of Spirastrellolide A
摘要:
Synthesis of the C1-C23 fragment in spirastrellolide A is described, featuring a cyclic acetal-tethered RCM for stereoselective constructions of spiroketal, and a 1,3-anti aldol involving methyl ketone enolate and Mukaiyama conditions.
Tandem Catalysis: The Sequential Mediation of Olefin Metathesis, Hydrogenation, and Hydrogen Transfer with Single-Component Ru Complexes
作者:Janis Louie、Christopher W. Bielawski、Robert H. Grubbs
DOI:10.1021/ja016431e
日期:2001.11.1
extensive use in olefin metathesis, it was also recently shown to be an effective precatalyst for mediating radical additions and hydrogenation reactions. We recently demonstrated all three reactions could be performed in tandem to afford well-defined block copolymers. Herein, we report that complex 1, or its more active derivative 2, is also useful in mediating a variety of other catalytic hydrogenation
The rapid and regioselective synthesis of a series of 2,6-disubstituted dihydropyranic building-blocks bearing an oxygenated side chain is described. The corresponding 4-iodo tetrahydropyran precursors, easily prepared by Prins cyclization, underwent regioselective elimination in the presence of an In(OAc)3/LiI system to provide the title compounds. The one-pot Prins cyclization-elimination process
TRICYCLIC PYRIDINE DERIVATIVES, MEDICAMENTS CONTAINING SUCH COMPOUNDS, THEIR USE AND PROCESS FOR THEIR PREPARATION
申请人:WAGNER Holger
公开号:US20120046304A1
公开(公告)日:2012-02-23
The present invention relates to compounds defined by formula I
wherein the variables R
1
-R
8
are defined as in the description, possessing valuable pharmacological activity. Particularly, the compounds are inhibitors of cholesterol ester transfer protein (CETP) and thus are suitable for treatment and prevention of diseases which can be influenced by inhibition of this enzyme.
Convenient Synthesis of 6,6-Bicyclic Malonamides: A New Class of Conformationally Preorganized Ligands for f-Block Ion Binding
作者:Bevin W. Parks、Robert D. Gilbertson、Dylan W. Domaille、James E. Hutchison
DOI:10.1021/jo0617262
日期:2006.12.1
intermediate. This intermediate is converted to the final products via reductiveamination with an appropriately functionalized benzylamine, followed by hydrogenolysis and lactam formation. Because derivatization occurs late in the synthesis, the approach is general, requiring only modification of the purification procedures for each newderivative. To aid in the purification of the bicyclic malonamides, we report
[EN] TETRAHYDRONAPHTHYL- PIPERAZINES AS 5-HT1B ANTAGONISTS, INVERSE AGONISTS AND PARTIAL AGONISTS<br/>[FR] TETRAHYDRONAPHTHYLPIPER- AZINES UTILISEES EN TANT QU'AGONISTES INVERSES, AGONISTES PARTIELS ET ANTAGONISTES DE 5-HT1B
申请人:PFIZER PROD INC
公开号:WO2005113527A1
公开(公告)日:2005-12-01
The present invention relates to novel tetrahydronaphthylpiperazines derivatives, that are compounds of the formula (I) wherein R1, R2 and R6 are as defined herein, X is CH2 or O, A is a group of the formula (G1, G2, G2a, G3, G4, G5 or G6) depicted below, and D is a group of the formula (D), wherein Y, W and Z are C or N and wherein R7 is as defined herein and their salts and compositions which include selective antagonists, inverse agonists and partial agonists of serotonin 1 (5-HT1) receptors. Compounds of the invention are useful in treating or preventing depression, anxiety, obsessive compulsive disorder (OCD) and other disorders for which a 5-HT1 agonist or antagonist is indicated.