90369-76-9Relevant articles and documents
Enantioselective Intermolecular C-H Amination Directed by a Chiral Cation
Fanourakis, Alexander,Paterson, Kieran J.,Phipps, Robert J.,Williams, Benjamin D.
, p. 10070 - 10076 (2021/07/21)
The enantioselective amination of C(sp3)-H bonds is a powerful synthetic transformation yet highly challenging to achieve in an intermolecular sense. We have developed a family of anionic variants of the best-in-class catalyst for Rh-catalyzed C-H amination, Rh2(esp)2, with which we have associated chiral cations derived from quaternized cinchona alkaloids. These ion-paired catalysts enable high levels of enantioselectivity to be achieved in the benzylic C-H amination of substrates bearing pendant hydroxyl groups. Additionally, the quinoline of the chiral cation appears to engage in axial ligation to the rhodium complex, providing improved yields of product versus Rh2(esp)2 and highlighting the dual role that the cation is playing. These results underline the potential of using chiral cations to control enantioselectivity in challenging transition-metal-catalyzed transformations.
THIAZOLOPYRIMIDINONE DERIVATIVES AS PI3 KINASE INHIBITORS
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Page/Page column 43, (2010/12/18)
This invention relates to the use of thiazolopyrimidinone derivatives for the modulation, notably the inhibition of the activity or function of the phosphoinositide 3' OH kinase family (hereinafter PI3 kinases), suitably, PI3Kα, PI3Kδ, PI3Kβ, and/or PI3Kγ
Synthesis, reactions, and structural and NMR features of [2.2]metacyclophane monoenes and their tricarbonylchromium and cyclopentadienyliron(+) complexes
Mitchell, Reginald H.,Zhang, Limin
, p. 7140 - 7152 (2007/10/03)
8,16-Dimethyl-, 5,8,13,16-tetramethyl-, and 4,6,8,12,14,16- hexamethyl[2.2]metacyclophanene have been synthesized from the corresponding methyl-substituted 3-thia[3.2]metacyclophane precursors via a Wittig rearrangement-Hofmann elimination procedure. Simp