Thieme Chemistry Journal Awardees- Whereare They Now? An Asymmetric Organocatalytic Sequence towards4a-Methyl Tetrahydroxanthones: Formal Synthesis of 4-Dehydroxydiversonol

Tricyclic systems generated by an asymmetric vinylogous aldol-oxa-Michael reaction of salicylaldehydes with senecialdehyde were further elaborated using a strategy developed by Tietze et al. to generate 4a-methyl tetrahydroxanthones.