Stoichiometric and catalytic reductive aldol cyclizations of alkynediones induced by Stryker's reagent
作者:Pauline Chiu、Sze Kar Leung
DOI:10.1039/b407842j
日期:——
Conjugate reduction of alkynones by stoichiometric [(Ph3P)CuH]6 or catalytic [(Ph3P)CuH]6 and polymethyl-hydrosiloxane proceeds to cyclization by an aldol reaction with tethered ketones to generate β-hydroxyenones with good diastereoselectivity.
Asymmetric Construction of Alkaloids by Employing a Key ω‐Transaminase Cascade
作者:Freya Taday、James Ryan、Stephen P. Argent、Vittorio Caprio、Beatriz Maciá、Elaine O'Reilly
DOI:10.1002/chem.202000067
日期:2020.3.23
intramolecular aza-Michael reaction has been employed for the preparation of cyclic β-enaminones in good yield and excellent enantio- and diastereoselectivity, starting from easily accessible prochiral ketoynones and commercially available enzymes. The powerful thermodynamic driving force associated with the spontaneous aza-Michael reaction effectively displaces the transaminase reaction equilibrium towards product