959144-37-7Relevant articles and documents
Two Stereoinduction Events in One C?H Activation Step: A Route towards Terphenyl Ligands with Two Atropisomeric Axes
Dherbassy, Quentin,Djukic, Jean-Pierre,Wencel-Delord, Joanna,Colobert, Fran?oise
, p. 4668 - 4672 (2018)
Herein we disclose the synthesis of original chiral scaffolds—ortho-orientated terphenyls presenting two atropisomeric Ar–Ar axes. These unusual structures were built up by using the C?H activation approach, and remarkably, both chiral axes were controlled with excellent stereoselectivity in a single transformation. During the reaction, not only does atroposelective functionalization of a biaryl precursor occur to establish one stereogenic axis, but an unprecedented atropo-stereoselective C?H arylation also takes place to generate the second stereogenic element. These enantiomerically pure ortho-terphenyls show an original tridimensional structure and thus constitute a unique foundation for building up a library of enantiomerically pure bidentate ligands, such as the new ligands S/N-Biax and diphosphine BiaxPhos.
NOVEL SULFONAMIDOMETHYLPHOSPHONATE INHIBITORS OF BETA-LACTAMASE
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Page/Page column 25, (2008/06/13)
This invention provides novel β-lactamase inhibitors of the aryl-and heteroaryl-sulfonamidomethylphosphonate monoester class. The compounds inhibit three classes of β-lactamases and synergize the antibacterial effects of β-lactam antibiotics (e.g., imipenem and ceftazimdime) against those micro-organisms normally resistant to the β-lactam antibiotics as a result of the presence of the β-lactamases. Formula (I) or a pro-drug or pharmaceutically acceptable salt thereof, wherein: W represents: Formula (II).