Nickel-Catalyzed Cross-Electrophile Coupling of 2-Chloropyridines with Alkyl Bromides
作者:Daniel Weix、Daniel Everson、Joseph Buonomo
DOI:10.1055/s-0033-1340151
日期:——
of 2-alkylated pyridines by the nickel-catalyzed cross-coupling of two different electrophiles, 2-chloropyridines with alkyl bromides, is described. Compared to our previously published conditions for aryl halides, this method uses the different, more rigid bathophenanthroline ligand and is conducted at high concentration in DMF solvent. The method displays promising functional group compatibility and
α-Iodocycloalkenones: Synthesis of (±)-epibatidine
作者:Nilantha S. Sirisoma、Carl R. Johnson
DOI:10.1016/s0040-4039(98)00187-7
日期:1998.4
A synthesis of the non-opiate analgesic alkaloid epibatidine was achieved in 13 steps and 13% overall yield starting from 1,3-cyclohexadiene using in a key step a modified Stille coupling reaction on an α-iodocyclohexenone.
A Pd catalyzed desymmetrization of cis-3,6-dibenzoyloxy-2-cyclohexene and a Pd catalyzed cross-coupling constitute key reactions in a synthesis of the non-opioid analgesic (−)-epibatidine.
The effect of DMSO on the borohydride reduction of a cyclohexanone: A formal enantioselective synthesis of (+)-epibatidine
作者:M.Teresa Barros、Christopher D. Maycock、M.Rita Ventura
DOI:10.1016/s0040-4039(98)02354-5
日期:1999.1
An asymmetric synthesis of (+)-epibatidine is described which uses the increased stereoselectivity of a borohydride reduction induced by the presence of DMSO. (C) 1998 Elsevier Science Ltd. All rights reserved.