Concise Preparation of the Bis-THF Core of Annonaceous Acetogenins
作者:Margarita Brovetto、Gustavo Seoane、Elisa Delgue
DOI:10.1055/s-0035-1561494
日期:——
A concise preparation of the all-(R) threo/trans/threo/trans/threo bis-THF core present in natural acetogenins is presented. Starting from a terminal alkene, homometathesis and two consecutive stereoselective cyclizations afforded the bis-THF core through a short and efficient sequence. In addition, the isomeric erythro/trans/threo/trans/erythro bis-THF core was also synthesized in high yield. The starting alkene was previously prepared from a homochiral cis-diol derived from biotransformation of bromobenzene.