aDepartment of Organic Chemistry, Institute of Chemical Technology, Prague, Czech Republic bDepartment of Solid State Chemistry, Institute of Chemical Technology, Prague, Czech Republic cInstitute of Microbiology, Academy of Science of the Czech Republic, Prague dInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
Аннотация:
The UV illumination of title compounds 3a,b in acetonitrile solutions leads to corresponding five-membered ring isomers 4a,b, probably, via open-ring intermediates, whereas the photocolouration was observed in the solid state