A novel and regioselective approach to carbonyl-containing alkylchlorides via silver-catalyzed ring-opening chlorination of cycloalkanols is reported. Concurrent C(sp3)–C(sp3) bond cleavage and C(sp3)–Cl bond formation efficiently occur with good yields under mild conditions, and the chlorinated products are readily transformed into other useful synthetic intermediates and drugs. The reaction features
Various functionalized aryl and alkenyl manganese halides have been prepared from the corresponding aryl and alkenylhalides according to a one-pot procedure: lithium-halogen exchange at low temperature then Li-Mn transmetallation. (C) 1997 Published by Elsevier Science Ltd.
SUBSTITUTED ANILINIC PIPERIDINES AS MCH SELECTIVE ANTAGONISTS