A heterogeneous gold(I)-catalyzed regioselective hydration of propargyl acetates toward α-acyloxy methyl ketones
作者:Yingying Du、Fang Yao、Rongli Zhang、Mingzhong Cai
DOI:10.1016/j.jorganchem.2020.121136
日期:2020.3
heterogeneous gold(I)-catalyzed regioselective hydration of propargylacetates has been developed that proceeds smoothly in 1,4-dioxane at room temperature in the presence of 1 mol% diphenylphosphine-modified MCM-41-anchored gold(I) complex [Ph2P-MCM-41-AuSbF6] as catalyst and provides an efficient and practical approach for the synthesis of a variety of α-acyloxy methyl ketones with high atom economy
Indazolin-<i>s</i>-ylidene–N-Heterocyclic Carbene Complexes of Rhodium, Palladium, and Gold: Synthesis, Characterization, and Catalytic Hydration of Alkynes
properties of these complexes were modified by the introduction of different substituents at the coordinated NHC ligands. Catalytic properties of the goldcomplex were evaluated in the hydration of alkynes to give the corresponding ketone products. This new type of gold N-heterocyclic carbenecomplex showed a high catalytic activity in the hydration of alkyne at roomtemperature.
2-OXAZOLAMINES AND THEIR USE AS 5-HT2B RECEPTOR ANTAGONISTS
申请人:ASTERAND UK LIMITED
公开号:EP1474140B1
公开(公告)日:2007-11-21
US7429607B2
申请人:——
公开号:US7429607B2
公开(公告)日:2008-09-30
[EN] 2-OXAZOLAMINES AND THEIR USE AS 5-HT2B RECEPTOR ANTAGONISTS<br/>[FR] 2-OXAZOLAMINES ET LEUR UTILISATION COMME ANTAGONISTES DU RECEPTEUR 5-HT2B
申请人:PHARMAGENE LAB LTD
公开号:WO2003068226A1
公开(公告)日:2003-08-21
The present invention relates to compounds of formula (I): wherein one of R1 and R4 is selected from the group consisting of H, and optionally substituted C1-6 alkyl, C3-7 cycloalkyl, C3-7 cycloalkyl-C1-4 alkyl, and phenyl-C1-4 alkyl; and the other of R1 and R4 is an optionally substituted C9-14 aryl group; R2 and R3 are either:(i) independently selected from H, R, R', SO2R, C(=O)R, (CH2)nNR5R6, where n is from 1 to 4 and R5 and R6 are independently selected from H and R, where R is optionally substituted C1-4 alkyl, and R' is optionally substituted phenyl-C1-4 alkyl, or (ii) together with the nitrogen atom to which they are attached, form an optionally substituted C5-7 heterocyclic group; and their use as pharmaceuticals, in particular for treating conditions alleviated by the antagonism of a 5-HT2B receptor.