- Bismuth Compounds in Radical Catalysis: Transition Metal Bismuthanes Facilitate Thermally Induced Cycloisomerizations
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The controlled radical chemistry of bismuth compounds is still in its infancy. Further developments are fueled by the properties of these complexes (e.g., low toxicity, high functional group tolerance, low homolytic bond dissociation energies, and reversible homolytic bond dissociations), which are highly attractive for applications in synthetic chemistry. Here we report the first catalytic application of transition metal bismuthanes (i.e. compounds with a Bi–TM bond; TM=transition metal). Using the catalyzed radical cyclo-isomerization of δ-iodo-olefins as a model reaction, characteristics complementary or superior to known B, Mn, Cu, Zn, Sn, and alkali metal reagents are demonstrated (including a different crucial intermediate), establishing transition metal bismuthanes as a new class of (pre-)catalysts for controlled radical reactions.
- Ramler, Jacqueline,Krummenacher, Ivo,Lichtenberg, Crispin
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supporting information
p. 12924 - 12929
(2019/08/02)
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- 2- PYRIDONE COMPOUND
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PROBLEM TO BE SOLVED: To provide a compound that has excellent glucokinase (GK) activating action and is useful as a pharmaceutical. SOLUTION: The present invention provides a 2-pyridone compound represented by formula [1], and a tautomer or stereoisomer of the compound, or their pharmacologically acceptable salts, or their solvates (where R1 is RA-ZA-; RA is any of a carboxy group, a sulfo group or formula [5]). COPYRIGHT: (C)2016,JPOandINPIT
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Paragraph 0254; 0255
(2016/10/08)
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- Pyrazole glucokinase activators
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Disclosed herein are pyrazole glucokinase activators of the formula (I) useful for the treatment of metabolic diseases and disorders, preferably diabetes mellitus.
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Page/Page column 79
(2008/06/13)
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- Synthesis of bicyclic tertiary α-amino acids
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Novel bicyclic α-amino acids, exo and endo-1-azabicyclo-[2.2.1] heptane-2-carboxylic acid, 1-azabicyclo[2.2.1]heptane-7-carboxylic acid, and 1-azabicyclo[3.2.2]nonane-2-carboxylic acid have been readily synthesized for the generation of neuronal nicotinic receptor ligands. Alkylation of glycine-derived Schiff bases or nitroacetates with cyclic ether electrophiles, followed by acid-induced ring opening and cyclization in NH4OH, allowed for the preparation of substantial quantities of the three tertiary bicyclic α-amino acids.
- Strachan, Jon-Paul,Whitaker, Regina C.,Miller, Craig H.,Bhatti, Balwinder S.
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p. 9909 - 9911
(2007/10/03)
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- Substituted-cycloalkyl and oxygenated-cycloalkyl glucokinase activators
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2,3-Di-substituted N-heteroaromatic propionamides with said substitution at the 2-position being a substituted phenyl group and at the 3-position being a polar ring, said propionamides being glucokinase activators which increase insulin secretion in the treatment of type II diabetes.
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- DESIGN AND SYNTHETIC APPLICATIONS OF NEW HETEROMETALLACYCLES
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The reaction of cyclic anhydrides with Ni(0) complexes lead to the formation of nickelacycles by oxidative addition followed by decarbonylation.The preparation of chiral nickelacycles from anhydrides derived from amino acids and their reactivity is described.The formation of new heteropalladacycles by C-H activation or transmetallation reactions and their reactivity will be also discussed.
- Echavarren, Antonio M.,Cardenas, Diego J.,Castano, Ana M.,Cuerva, Juan M.,Mateo, Cristina
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p. 549 - 558
(2007/10/02)
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