863565-84-8Relevant academic research and scientific papers
Platinum-Catalyzed α,β-Desaturation of Cyclic Ketones through Direct Metal–Enolate Formation
Chen, Ming,Dong, Guangbin
, p. 7956 - 7961 (2021)
The development of a platinum-catalyzed desaturation of cyclic ketones to their conjugated α,β-unsaturated counterparts is reported in this full article. A unique diene-platinum complex was identified to be an efficient catalyst, which enables direct metal-enolate formation. The reaction operates under mild conditions without using strong bases or acids. Good to excellent yields can be achieved for diverse and complex scaffolds. A wide range of functional groups, including those sensitive to acids, bases/nucleophiles, or palladium species, are tolerated, which represents a distinct feature from other known desaturation methods. Mechanistically, this platinum catalysis exhibits a fast and reversible α-deprotonation followed by a rate-determining β-hydrogen elimination process, which is different from the prior Pd-catalyzed desaturation method. Promising preliminary enantioselective desaturation using a chiral-diene-platinum complex has also been obtained.
THERAPEUTIC AMIDE DERIVATIVES
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Page/Page column 159-160, (2010/02/13)
The present invention relates to compounds of the formula (I): or a pharmaceutically acceptable salt or solvate thereof, wherein: A and B independently represent CH2 or O, with the proviso that A and B are not simultaneously O; Cy represents one of the following Formula (II) optionally substituted by one to three groups selected from hydroxy, halogen, C1-6alkyl, C1-6alkoxy, C1-6 haloalkyl, C1-6alkylamino and amino; R1 and R2 are independently selected from hydroxy, halogen, C1-6alkyl, C1-6alkoxy, C1-6 haloalkyl and C3-8 cycloalkyl; n represents an integer from 0-4; X is hydrogen, hydroxy, halogen or C1-6alkoxy; Y is oxy, thio, a 1-4 membered alkylene, a 2-4 membered alkylene ether, 2-4 membered alkylene thioether or an oxyethyleneoxy group, optionally substituted by 1 to 4 groups independently selected from hydroxy, halogen, C1-6alkyl, C1-6alkoxy and C1-6 haloalkyl; Z is CH or N; and p represents an integer from 0-5 when Z is CH or 0-4 when Z is N; when p represents 2 or more, two of R2s may be taken together with the carbon atoms to which they are attached to form a 5-8 membered cycloalkyl ring to processes for the preparation of, intermediates used in the preparation of, compositions containing such compounds and the uses of such compounds as antagonists of the NMDA NR2B receptor.
