Ferrocene Analogues of Hydrogen-Bond-Donor Catalysts: An Investigative Study on Asymmetric Michael Addition of 1,3-Dicarbonyl Compounds to Nitroalkenes
作者:Rajiv Trivedi、Kadiyala Rao、M. Kantam
DOI:10.1055/s-0034-1379491
日期:——
moieties. A stepwise sequential route was used to assemble the various components of these ferrocene derivatives. The resulting bifunctional catalysts were used successfully in asymmetric Michael additions of 1,3-dicarbonylcompounds to β-nitrostyrenes. The corresponding products were obtained in high yields and in good to excellent enantioselectivities and diastereoselectivities under mild conditions by
Preliminary Synthetic Studies of Methyllycaconitine, a Potent Nicotinic Acetylcholine Receptor Antagonist: Rapid Syntheses of AE-Bicyclic Analogues
作者:Philippa A Coates、Ian S Blagbrough、Michael G Rowan、David P J Pearson、Terence Lewis、Barry V L Potter
DOI:10.1111/j.2042-7158.1996.tb07125.x
日期:2011.4.12
series of bicyclic analogues incorporating the homocholine motif of methyllycaconitine has been prepared to test the hypothesis that this is the essential pharmacophore of this potent, selective nicotinic receptor antagonist. A double Mannich reaction has been employed to construct the 3-azabicyclo[3.3.1]-nonane ring system, containing an N-ethylpiperidine moiety. The neopentyl-like alcohol was then