A Facile Direct Route to
<i>N</i>
‐(Un)substituted Lactams by Cycloamination of Oxocarboxylic Acids without External Hydrogen
作者:Hu Li、Hongguo Wu、Heng Zhang、Yaqiong Su、Song Yang、Emiel J. M. Hensen
DOI:10.1002/cssc.201901780
日期:2019.8.22
Lactams are privileged in bioactive natural products and pharmaceutical agents and widely featured in functional materials. This study presents a novel versatile approach to the direct synthesis of lactams from oxocarboxylic acids without catalyst or external hydrogen. The method involves the in situ release of formic acid from formamides induced by water to facilitate efficient cycloamination. Water
The Brønsted acid-catalyzed synthesis of secondary amides from ketones under mild conditions is described via transoximation and Beckmann rearrangement using O-protected oximes as more stable equivalents of explosive O-protected hydroxylamines. This methodology could be applied to highly rearrangement-selective amide synthesis from α-branched alkyl arylketones and performed on a 1-g scale. The presence
A process for preparing N-alkenyl-amides by reacting the corresponding NH-amides with acetylenes in the liquid phase in the presence of basic alkali metal compounds and of a cocatalyst comprises using as the cocatalyst compounds of the general formulae (Ia) and/or (Ib)
R
1
O—(CH
2
CH
2
CH
2
CH
2
O)
n
—H (Ia):
R
1
O—(CH
2
CH
2
CH
2
CH
2
O)
n
—R
2
, (Ib):
where n is 1, 2 or 3 and R
1
and R
2
are independently C
1
- to C
6
-alkyl or C
2
- to C
6
-alkenyl, or together a butenyl unit.
[EN] DISUBSTITUTED AZEPAN OREXIN RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DES RÉCEPTEURS DE L'OREXINE DE TYPE AZÉPANE DISUBSTITUÉ
申请人:MERCK SHARP & DOHME
公开号:WO2010048017A1
公开(公告)日:2010-04-29
The present invention is directed to disubstituted azepan and oxazepan amide compounds which are antagonists of orexin receptors, and which are useful in the treatment or prevention of neurological and psychiatric disorders and diseases in which orexin receptors are involved. 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 orexin receptors are involved.
[EN] BRIDGED TRICYCLIC CARBAMOYLPYRIDONE COMPOUNDS AND THEIR PHARMACEUTICAL USE<br/>[FR] COMPOSÉS DE CARBAMOYLPYRIDONE TRICYCLIQUE PONTÉS ET LEUR UTILISATION PHARMACEUTIQUE
申请人:GILEAD SCIENCES INC
公开号:WO2020197991A1
公开(公告)日:2020-10-01
Compounds for use in treating or preventing human immunodeficiency virus (HIV) infection are disclosed. The compounds have the following formula (I): including stereoisomers and pharmaceutically acceptable salts thereof, wherein R1, R2, L, W1, W2, X, Y, and Z are as defined herein. Methods associated with the preparation and use of such compounds, as well as pharmaceutical compositions comprising such compounds, are also disclosed.