Studies Dealing with Thionium Ion Promoted Mannich Cyclization Reactions
作者:Albert Padwa、Alex G. Waterson
DOI:10.1021/jo991414h
日期:2000.1.1
six-membered alkylthio-substituted lactams as transient intermediates. Further reaction of the alkylthio-substituted lactam with DMTSF generates an N-acyliminium ion, which undergoes cyclization with the tethered aromatic ring to produce an azapolycyclic ring system. Related cyclization sequences occur when amido thioacetals possessing simple olefinic tethers were used. The overall procedure represents an efficient
Cyclisation of acetylenic ethoxylactams 1b-12b leads to bridgehead nitrogen bicyclic ketones in excellent yields. The reaction is weakly acid-catalysed and proceeds at ambient temperature. The observed regioselectivity effect is discussed in terms of stability of exo vs endo vinylcations and ring strain effects. The high yield conversion of N-(5-hexynyl)-ethoxy lactams 7b and 8b in the 5/8 and 6/8
[EN] BENZAMIDE CGRP RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES BENZAMIDES DES RÉCEPTEUR CGRP
申请人:MERCK SHARP & DOHME
公开号:WO2015161011A1
公开(公告)日:2015-10-22
The present invention is directed to benzamide compounds which are antagonists of CGRP receptors and useful in the treatment or prevention of diseases in which CGRP is involved, such as migraine. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which CGRP is involved.
The Thionium/N-Acyliminium Ion Cyclization Cascade as a Strategy for the Synthesis of Azapolycyclic Ring Systems
作者:Albert Padwa、Alex G. Waterson
DOI:10.1016/s0040-4020(00)00861-9
日期:2000.12
thiophenyl lactams with BF3·2AcOH which resulted in the generation of an N-acyliminiumion. Cyclization of the iminium ion onto the tethered aromatic ring led to various azapolycyclic ring systems. A related cyclization sequence also occurred with amidosulfoxides that possess simple olefinic tethers. The method was applied toward the synthesis of a member of the protoberberine alkaloid family.
Compounds and methods for the treatment or prevention of Flavivirus infections
申请人:Denis Real
公开号:US20060276533A1
公开(公告)日:2006-12-07
Compounds represented by formula I:
or pharmaceutically acceptable salts and solvates thereof, wherein R
1
, X, Y, Y
1
, and Z are as defined herein, are useful for treating flaviviridae viral infections.