Starting from Dane’s diene and methylcyclopentenedione, (+)-estrone is synthesized along the Quinkert−Dane route in 24% total yield. The key step is an enantioselective Diels−Alder reaction promoted ...

Five new lindenane disesquiterpenoids, chlorajaponilides A–E (1–5), together with 11 known analogues were isolated from whole plants of Chloranthus japonicus. The structure and absolute configuration ...