22494-48-0Relevant articles and documents
N-Heterocyclic Carbene Ligand-Controlled Chemodivergent Suzuki-Miyaura Cross Coupling
Reeves, Emily K.,Humke, Jenna N.,Neufeldt, Sharon R.
, p. 11799 - 11812 (2019/10/11)
Two N-heterocyclic carbene ligands provide orthogonal chemoselectivity during the Pd-catalyzed Suzuki-Miyaura (SM) cross-coupling of chloroaryl triflates. The use of SIPr [SIPr = 1,3-bis(2,6-diisopropylphenyl)-4,5-dihydroimidazol-2-ylidene] leads to selective cross-coupling at chloride, while the use of SIMes [SIMes = 1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene] provides selective coupling at triflate. With most chloroaryl triflates and arylboronic acids, ligand-controlled selectivity is high (≥10:1). The scope of this methodology is significantly more general than previously reported methods for selective SM coupling of chloroaryl triflates using phosphine ligands. Density functional theory studies suggest that palladium's ligation state during oxidative addition is different with SIMes compared to SIPr.
Preparation method and application of dimethyl acetylacetone gold
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Paragraph 0021; 0022; 0023, (2018/11/22)
The invention relates to a preparation method and application of dimethyl acetylacetone gold. The preparation method comprises the following steps: (1) dissolving gold chloride into ethyl ether, adding methyl iodide, and stirring for 1-2 hours at the room temperature so as to obtain a reaction liquid A; (2) putting potassium tert-butoxide into acetylacetone, and stirring for 10-15 minutes at the room temperature so as to obtain a reaction liquid B; (3) at ice bath, mixing the reaction liquid A with the reaction liquid B, recovering to the room temperature naturally, carrying out a stirring reaction for 30-40 minutes, diluting with the ethyl ether, washing with water, and carrying out vacuum concentration with an organic layer (an ethyl ether layer), and carrying out vacuum drying, therebyobtaining the dimethyl (acetylacetone) gold (III).
Pyrimidinone compounds
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Page/Page column 8;9, (2008/06/13)
Pyrimidinone compounds of formula (I) are inhibitors of the enzyme Lp-PLA2 and of use in therapy, in particular for treating atherosclerosis.