33985-27-2Relevant academic research and scientific papers
Excited-State Palladium-Catalyzed 1,2-Spin-Center Shift Enables Selective C-2 Reduction, Deuteration, and Iodination of Carbohydrates
Zhao, Gaoyuan,Yao, Wang,Mauro, Jaclyn N.,Ngai, Ming-Yu
, p. 1728 - 1734 (2021/02/06)
Excited-state catalysis, a process that involves one or more excited catalytic species, has emerged as a powerful tool in organic synthesis because it allows access to the excited-state reaction landscape for the discovery of novel chemical reactivity. Herein, we report the first excited-state palladium-catalyzed 1,2-spin-center shift reaction that enables site-selective functionalization of carbohydrates. The strategy features mild reaction conditions with high levels of regio- and stereoselectivity that tolerate a wide range of functional groups and complex molecular architectures. Mechanistic studies suggest a radical mechanism involving the formation of hybrid palladium species that undergoes a 1,2-spin-center shift followed by the reduction, deuteration, and iodination to afford functionalized 2-deoxy sugars. The new reactivity will provide a general approach for the rapid generation of natural and unnatural carbohydrates.
METHODS AND COMPOSITIONS FOR MAKING ANTIBODIES AND ANTIBODY DERIVATIVES WITH REDUCED CORE FUCOSYLATION
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Page/Page column, (2014/01/23)
The invention provides methods and compositions for preparing antibodies and antibody derivatives with reduced core fucosylation.
METHODS AND COMPOSITIONS FOR MAKING ANTIBODIES AND ANTIBODY DERIVATIVES WITH REDUCED CORE FUCOSYLATION
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Paragraph 0253; 0254, (2014/02/16)
The invention provides methods and compositions for preparing antibodies and antibody derivatives with reduced core fucosylation.
Methods and compositions for making antibodies and antibody derivatives with reduced core fucosylation
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, (2012/05/04)
The invention provides methods and compositions for preparing antibodies and antibody derivatives with reduced core fucosylation.
Indium-Mediated Allylation of Aldehydes: A Convenient Route to 2-Deoxy and 2,6-Dideoxy Carbohydrates
Binder, Wolfgang H.,Prenner, Reinhard H.,Schmid, Walther
, p. 749 - 758 (2007/10/02)
The allylation of protected polyhydroxy aldehydes 1 and 14 has been achieved by indium metal with ultrasound promotion generating the diastereomeric pair of homoallylic polyols 3, 4 and 16, 17 respectively with moderate to good stereoselectivity.Pursuing this allylation strategy with the corresponding deprotected polyhydroxy aldehydes led to the same pair of homoallylic polyols but with a quite different ratio of the diastereomers generated.The polyols were further transformed to 2-deoxy (5 and 6) and 2,6-dideoxy (18 and 19) carbohydrates by ozonolysis.
