51264-59-6Relevant articles and documents
NEW CYCLOHEXYL AND QUINUCLIDINYL CARBAMATE DERIVATIVES HAVING BETA2 ADRENERGIC AGONIST AND M3 MUSCARINIC ANTAGONIST ACTIVITY
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Page/Page column 110; 111, (2014/07/08)
The present invention relates to novel compounds having β2 adrenergic agonist and M3 muscarinic antagonist dual activity, to pharmaceutical compositions containing them, to the process for their preparation and to their use in respiratory therapies.
Triphenylphosphine-mediated reductive cyclization of 2-nitrobiphenyls: A practical and convenient synthesis of carbazoles
Freeman, Adam W.,Urvoy, Marie,Criswell, Megan E.
, p. 5014 - 5019 (2007/10/03)
The synthesis of a series of substituted carbazoles from the corresponding 2-nitrobiphenyl derivatives using a novel modification of the Cadogan reaction is described. Cyclization of the 2-nitrobiphenyls was achieved via reductive deoxygenation of the nitro groups using a slight excess of triphenylphosphine in a suitable solvent. We have observed a temperature dependence on the extent of conversion under these conditions, with higher boiling solvents affording higher yields across a range of substrates. The new reaction conditions are very straightforward and convenient to execute, tolerate a broad range of functional groups, and yield carbazole products in the absence of unwanted side products.