Trihaloisocyanuric Acid/Triphenylphosphine: An Efficient System for Regioselective Conversion of Epoxides into Vicinal Halohydrins and Vicinal Dihalides under Mild Conditions
作者:Marcio de Mattos、Vitor de Andrade
DOI:10.1055/s-0035-1560408
日期:——
vicinal chloro-/bromohydrins and vicinal dihalides by reaction with the system trihaloisocyanuric acid/triphenylphosphine in acetonitrile under mild and neutral conditions. The reactions proceed smoothly in high yield at room temperature and at reflux, respectively, over a short time. A new synthetic method has been developed for the regioselective conversion of epoxides to vicinal chloro-/bromohydrins
Abstract Suitable glycol ethers (3a–d, 4a–d) and halohydrine compounds (11a–c) were synthesized in good yield by the alkylation reactions of the oximes, having hydroxy and double bond in its structure, with mono‐ and dihalogenhydrines in the medium of basic and solid–liquid phase transfer catalyst. A series of aminoalcohols were synthesized from these compounds obtained (16a, 17b, 18b).
[EN] DOPAMINE D3 RECEPTOR ANTAGONISTS COMPOUNDS<br/>[FR] COMPOSÉS ANTAGONISTES DES RÉCEPTEURS D3 À LA DOPAMINE
申请人:INDIVIOR UK LTD
公开号:WO2016067043A1
公开(公告)日:2016-05-06
The disclosure is directed to novel dopamine D3 receptor antagonists, processes for their preparation, intermediates used in these processes, pharmaceutical compositions containing them and their use in therapy, including treating drug dependency and psychosis.
Synthesis of Di-, Tri-, and Tetrasubstituted Oxetanes by Rhodium-Catalyzed OH Insertion and CC Bond-Forming Cyclization
作者:Owen A. Davis、James A. Bull
DOI:10.1002/anie.201408928
日期:2014.12.15
Oxetanes offer exciting potential as structural motifs and intermediates in drug discovery and materials science. Here an efficient strategy for the synthesis of oxetane rings incorporating pendant functional groups is described. A wide variety of oxetane 2,2‐dicarboxylates were accessed in high yields, including functionalized 3‐/4‐aryl‐ and alkyl‐substituted oxetanes and fused oxetane bicycles. Enantioenriched