Synthesis of Highly Substituted Oxazoles through Iodine(III)-Mediated Reactions of Ketones with Nitriles
作者:Akio Saito、Nao Hyodo、Yuji Hanzawa
DOI:10.3390/molecules170911046
日期:——
trifluoromethanesulfonic acid (TfOH) or bis(trifluoromethane-sulfonyl)imide (Tf2NH), iodosobenzene (PhI=O) efficiently promoted the reactions of dicarbonyl compounds as well as monocarbonyl compounds with nitriles to give 2,4-disubstituted and 2,4,5-trisubstituted oxazole in a single step under the mild conditions.
AZETIDINE COMPOUNDS AS OREXIN RECEPTOR ANTAGONISTS
申请人:Aissaoui Hamed
公开号:US20100222600A1
公开(公告)日:2010-09-02
The invention relates to novel azetidine compounds of formula (I), wherein R
1
, R
2
, and X are as described in the description and their use as orexin receptor antagonists.
[EN] PHENETHYLAMIDE DERIVATIVES AND THEIR HETEROCYCLIC ANALOGUES<br/>[FR] DÉRIVÉS DE PHÉNÉTHYLAMIDE ET LEURS ANALOGUES HÉTÉROCYCLIQUES
申请人:ACTELION PHARMACEUTICALS LTD
公开号:WO2010044054A1
公开(公告)日:2010-04-22
The invention relates to novel phenethylamide derivatives and their heterocyclic analogues of formula (I), wherein A, B, R1, R2 and R3 are as described in the application, and to the use of such compounds, or of pharmaceutically acceptable salts of such compounds, as medicaments, especially as orexin receptor antagonists.
A Gold‐Catalyzed Acid‐Assisted Regioselective Cyclization for the Synthesis of Polysubstituted Oxazoles
作者:Qian Wang、Stephanie Hoffmann、Jasmin Schießl、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/ejoc.201900699
日期:2020.5.3
derivatives are obtained through a regioselective gold‐catalyzed reaction of α‐alkynylamides and alkynoates in the presence of nitriles. The intermediary obtained gold carbenes are generated by an alkyne oxidation with a pyridine N‐oxide. Acidic conditions ensure that only one of the two carbonyl oxygen atoms in these intermediates selectively cyclizes to the products in excellent yields.
作者:Alexey Yu. Dubovtsev、Dmitry V. Dar'in、Vadim Yu. Kukushkin
DOI:10.1002/adsc.201900097
日期:2019.6.18
Three‐component [2+2+1] gold(I)‐catalyzed reaction of internalalkynes (alkynyl esters or ‐ketones), nitriles, and 2‐chloropyridine N‐oxide led to a wide range of fully substituted 1,3‐oxazoles (32 examples; up to 92% isolated yields). Nitrile R3CN species, employed in the reaction as both reactants and solvents, comprise conventional nitriles (R3=Alk, Ar) and also push‐pull systems such as cyanamides