Development of Asymmetric Reactions Catalyzed by Chiral Organotin-Alkoxide Reagents
作者:Akira Yanagisawa、Kazuhiro Yoshida
DOI:10.1002/tcr.201200019
日期:2013.2
of an alcohol. In this Personal Account, we describe three types of asymmetric transformation that proceed through a chiral tin enolate: 1) The asymmetric aldol reaction of alkenyl esters or unsaturated lactones with aldehydes or isatins; 2) the asymmetric three-componentMannich-typereaction of alkenyl esters and related cycloaddition reactions; and 3) the asymmetric N-nitroso aldol reaction of unsaturated
Shashidhar, M. Srikantaiah; Bhatt, M. Vivekananda, Journal of the Chemical Society. Perkin transactions II, 1986, p. 355 - 358
作者:Shashidhar, M. Srikantaiah、Bhatt, M. Vivekananda
DOI:——
日期:——
Catalytic Enantioselective <i>N</i>-Nitroso Aldol Reaction of γ,δ-Unsaturated δ-Lactones
作者:Akira Yanagisawa、Takeo Fujinami、Yu Oyokawa、Takuya Sugita、Kazuhiro Yoshida
DOI:10.1021/ol300146k
日期:2012.5.18
A catalytic asymmetric N-nitroso aldol reaction of gamma,delta-didehydro-delta-lactones with nitrosoarenes was achieved using chiral tin dibromide as the chiral precatalyst and sodium ethoxide as the base precatalyst in the presence of ethanol. Optically active alpha-hydroxyamino ketones with up to 99% ee were regioselectively obtained in moderate to high yields from various delta-aryl-substituted gamma,delta-didehydro-delta-valerolactones and o-substituted nitrosoarenes.
SHASHIDHAR, M. SRIKANTAIAH;BHATT, M. VIVEKANANDA, J. CHEM. SOC. PERKIN TRANS., 1986, N 3, 355-358
作者:SHASHIDHAR, M. SRIKANTAIAH、BHATT, M. VIVEKANANDA
DOI:——
日期:——
Iodine(III)-Mediated Enantioselective Oxidative Contraction of Dihydropyranones