The present invention relates to a method of producing nornicotine through enantioselective hydrosilylation of myosmine and a composition produced thereby, as well as a composition comprising nornicotine and a catalyst, wherein the catalyst is an organic chiral Lewis base, and a catalyst. The present invention also relates to a method of producing nicotine or a salt thereof from myosmine through enantioselective hydrosilylation of myosmine to nornicotine and further reacting the nornicotine to nicotine or a salt thereof, and a composition produced thereby, as well as a composition comprising nicotine, or a salt thereof, and a catalyst, wherein the catalyst is an organic chiral Lewis base.
Mechanistic investigations of the asymmetric hydrosilylation of ketimines with trichlorosilane reveals a dual activation model and an organocatalyst with enhanced efficiency
作者:X. Li、A. T. Reeder、F. Torri、H. Adams、S. Jones
DOI:10.1039/c6ob02537d
日期:——
Structural probes used to help elucidate mechanistic information of the organocatalyzed asymmetricketimine hydrosilylation have revealed a new catalyst with unprecedented catalytic activity, maintaining adequate performance at 0.01 mol% loading. A new ‘dual activation’ model has been proposed that relies on the presence of both a Lewis basic and Brønstedacidic site within the catalyst architecture