Evaluation of furanocoumarins from seeds of the wild parsnip (Pastinaca sativa L. s.l.).

Although the wild parsnip (Pastinaca sativa L. s.l.

Photoinduced 1,2,3,4-tetrahydropyridine ring conversions.

Stable heterocyclic hydroperoxide can be easily prepared as a product of fast oxidation of a 1,2,3,4-tetrahydropyridine by (3)O2 if the solution is exposed to sunlight. The driving force for the photoinduced electron transfer is calculated from electrochemical and spectroscopic data. The outcome of the reaction depends on the light intensity and the concentration of O2.