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A new type of mechanistic probe for the intramolecular samarium Barbier reaction has been designed, and two different probe substrates have been investigated in detail. Remarkably, no unambiguous evidence could be obtained in favor of any of the obvious intermediates (free alkyl or alkoxy radicals, ketyls, organosamarium species) that are postulated for this reaction. Several possibilities for modified...
A diverse library of 1152 compounds based on a β-turn mimetic scaffold was synthesized. A subset of the library was characterized by ES-MS. Several compounds from the library with modest affinity to a cloned N-formyl-Met-Leu-Phe (fMLF) receptor were identified.
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