Chemistry of pyrrolizidine alkaloids revisited—semi-synthetic microwave and continuous-flow approaches toward Crotalaria-alkaloids
作者:Sabrina T. Martinez、Angelo C. Pinto、Toma Glasnov、C. Oliver Kappe
DOI:10.1016/j.tetlet.2014.05.055
日期:2014.7
Efficient and rapid syntheses of various pyrrolizidine alkaloids via microwave synthetic protocols using monocrotaline from a natural source (Crotalariaspectabilis) are reported. Retronecine, hydroxydanaidal, and acetylated hydroxydanaidal (utilized in the chemical communication system of various insect species) were obtained. In addition, a continuous flow hydrogenolysis/hydrogenation approach to
Compounds from
14
Kenyan plants, including from the root of
Dovyalis abyssinica
and
Clutia robusta
have been characterized and isolated, and their uses are disclosed.