Hydrogen borrowing catalysis using 1° and 2° alcohols: Investigation and scope leading to α and β branched products
作者:James R. Frost、Choon Boon Cheong、Wasim M. Akhtar、Dimitri F.J. Caputo、Kirsten E. Christensen、Neil G. Stevenson、Timothy J. Donohoe
DOI:10.1016/j.tet.2021.132051
日期:2021.4
variety of ketonesusing 1° or 2° alcohols under hydrogen borrowing catalysis is described. Initial research focused on the α-alkylation of cyclopropyl ketones with higher 1° alcohols (i.e. larger than MeOH), leading to the formation of α-branchedproducts. Our search for additional substrates with which to explore this chemistry led us to discover that di-ortho-substituted aryl ketones were also privileged
描述了在氢借位催化下使用1°或2°醇对各种酮进行的烷基化。最初的研究集中在环丙酮与更高的1°醇(即大于MeOH)的α-烷基化反应上,导致形成α-支化产物。我们通过寻找其他底物来探索这种化学反应,使我们发现,二邻位取代的芳基酮也是特有的支架,其中Ph ∗(C 6 Me 5)酮是最佳选择。进一步的研究表明,该基序对于与2°醇形成β支链产物的烷基化至关重要,这也为研究非对映选择性和分子内氢借入过程提供了机会。
Strategic Application and Transformation of <i>ortho</i>-Disubstituted Phenyl and Cyclopropyl Ketones To Expand the Scope of Hydrogen Borrowing Catalysis
作者:James R. Frost、Choon Boon Cheong、Wasim M. Akhtar、Dimitri F. J. Caputo、Neil G. Stevenson、Timothy J. Donohoe
DOI:10.1021/jacs.5b11196
日期:2015.12.23
The application of an iridium-catalyzed hydrogen borrowing process to enable the formation of α-branched ketones with higher alcohols is described. In order to facilitate this reaction, ortho-disubstituted phenyl and cyclopropylketones were recognized as crucial structural motifs for C-C bond formation. Having optimized the key catalysis step, the ortho-disubstituted phenyl products could be further
描述了铱催化的借氢过程在能够与高级醇形成 α-支化酮中的应用。为了促进该反应,邻位双取代的苯基和环丙基酮被认为是 CC 键形成的关键结构基序。在优化了关键催化步骤后,邻位二取代苯基产物可以通过反弗里德尔-克来福特酰化反应进一步操作,以产生合成有用的羧酸衍生物。相比之下,环丙基酮与几种亲核试剂进行同共轭加成,以提供进一步功能化的支化酮产物。
Ruthenium-catalyzed Isomerization of Alkenol into Alkanone in Water under Irradiation of Microwaves
Ruthenium catalyzed isomerization of alkenol into alkanone through a migration of C–C double bond was performed in water under irradiation of microwaves. When the reaction was performed in deuterium oxide instead of water, the trail of the migration was shown by H–D exchange reaction.
Cyclopropylindole derivatives as selective serotonin reuptake inhibitors
申请人:——
公开号:US20030073849A1
公开(公告)日:2003-04-17
The present invention relates to compounds of Formula (I) and pharmaceutically acceptable salts or solvates thereof and pharmaceutically acceptable formulations comprising said compounds
1
useful for the treatment of depression, anxiety disorders, premature ejaculation, chronic pain, obsessive-compulsive disorder, feeding disorders, premenstrual dysphoric disorder, panic disorders and psychotic disorders including bipolar disorder and schizophrenia.
Palladium-Catalyzed Ligand-Directed Oxidative Functionalization of Cyclopropanes
作者:Melanie Sanford、Asako Kubota
DOI:10.1055/s-0030-1260087
日期:2011.8
This report describes the palladium-catalyzed functionalization of cyclopropanes containing oxazoline, oxime ether, and pyridine directing groups. Three different oxidants were examined in these studies: IOAc, PhI(OAc)2, and benzoquinone. The reactions yielded products derived from 2˚ sp³ C-H functionalization and/or C-C activation of the cyclopropane ring. The outcome and the product distributions