Stereocontrolled Synthesis of <i>Z</i>-Dienes via an Unexpected Pericyclic Cascade Rearrangement of 5-Amino-2,4-pentadienals
作者:Sarah E. Steinhardt、Joel S. Silverston、Christopher D. Vanderwal
DOI:10.1021/ja8028125
日期:2008.6.18
Donor-acceptor dienes known as Zincke aldehydes, which derive readily from the ring-opening reactions of pyridinium salts with secondary amines, undergo a fascinating thermal rearrangement reaction to afford Z-alpha,beta,gamma,delta-unsaturated amides with excellent stereoselectivity. Efficient, stereocontrolled access to Z-trisubstituted alkenes with two different substitution patterns is possible
<scp>Pd‐Catalyzed</scp>
Asymmetric Synthesis of 3,
<scp>4‐Dihydroisoquinolinones</scp>
From
<scp>
<i>N</i>
‐Ts‐Benzamides
</scp>
and 1,
<scp>3‐Dienes</scp>
作者:Tae Kyun Kim、So Won Youn
DOI:10.1002/bkcs.12227
日期:2021.3
A Pd(II)‐catalyzed asymmetric oxidative annulation of N‐Ts‐benzamides with 1,3‐dienes using a chiral pyridine‐oxazoline‐type ligand for the regio‐ and stereoselective synthesis of chiral 3,4‐dihydroisoquinolinones has been developed.
[EN] PIPERIDINE DERIVATIVES AS LIVER X RECEPTOR β AGONISTS, COMPOSITIONS, AND THEIR USE<br/>[FR] DÉRIVÉS DE PIPÉRIDINE EN TANT QU'AGONISTES DES RÉCEPTEURS BÊTA X DU FOIE, COMPOSITIONS ET UTILISATION ASSOCIÉES
申请人:MERCK SHARP & DOHME
公开号:WO2018068296A1
公开(公告)日:2018-04-19
Piperidine compounds of the Formular: (I) and pharmaceutically acceptable salts thereof, wherein X, Y, R 1, R 2, R 3, L, R 4, L 1, Q and R 5 are as defined herein. The compounds and pharmaceutically acceptable compositions comprising a compound thereof, are useful as Liver X-β receptor (LXRβ) agonists, and may be useful for treating or preventing pathologies related thereto. Such pathologies include, but are not limited to, inflammatory diseases and diseases characterized by defects in cholesterol and lipid metabolism, such as Alzheimer's disease.
Cyano-Dienes, Halopyridines, intermediates and a process for their preparation
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0323881A1
公开(公告)日:1989-07-12
A process for preparing a compound of the formula
wherein
R₁ is C(O)R₂ or SO₂CH₂CH₃;
R₂ is C₁-C₂ dialkylamino; and
X is F, Cl or Br;
said process comprising reacting a malonodialdehyde bis(acetal) with a substituted acetonitrile of formula R₁CH₂CN in the presence of acetic anhydride and a zinc halide catalyst, and cyclizing the resulting cyanodiene in the presence of acetic acid and HX.