895239-90-4Relevant academic research and scientific papers
ORGANIC COMPOUNDS
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Page/Page column 120-121, (2008/06/13)
Novel 3-mono-, 3,4-di- and 3,4,4,-tri-substituted pyrrolidine compounds, these compounds for use in the diagnostic and therapeutic treatment of a warm-blooded animal, especially for the treatment of a disease (= disorder) that depends on inappropriate activity of renin; the use of a compound of that class for the preparation of a pharmaceutical formulation for the treatment of a disease that depends on inappropriate activity of renin; the use of a compound of that class in the treatment of a disease that depends on inappropriate activity of renin; pharmaceutical formulations comprising a said substituted pyrrolidine compound, and/or a method of treatment comprising administering a said substituted pyrrolidine compound, a method for the manufacture of said substituted pyrrolidine compounds, and novel inter-mediates and partial steps for their synthesis are described. The substituted pyrrolidine compounds are especially of the formula (I), wherein the substituents are as described in the specificacion.
A ring expansion-annulation strategy for the synthesis of substituted azulenes. Preparation and suzuki coupling reactions of 1-azulenyl triflates
John L Jr., Kane,Shea, Kevin M.,Crombie, Aimee L.,Danheiser, Rick L.
, p. 1081 - 1084 (2007/10/03)
(matrix presented) A new strategy for the synthesis of substituted azulenes is reported, based on the reaction of β′-bromo-α-diazo ketones with rhodium carboxylates The key transformation involves intramolecular addition of a rhodium carbenoid to an arene π-bond, electrocyclic ring opening, β-elimination, tautomerization, and trapping to produce 1-hydroxyazulene derivatives. The synthetic utility of the method is enhanced by the ability of the triflate derivatives to participate in Suzuki coupling reactions, as illustrated in a synthesis of the antiulcer drug egualen sodium (KT1-32).
