Asymmetric Synthesis of (+)-Altholactone: A Styryllactone Isolated from VariousGoniothalamus Species
作者:Dieter Enders、Julien Barbion
DOI:10.1002/chem.200701647
日期:2008.3.17
The asymmetric total synthesis of (+)-altholactone (1), a member of the styryllactone family of natural products displaying cytotoxic and antitumor activities, is described. Key steps include a RAMP-hydrazone alpha-alkylation (RAMP=(R)-1-amino-2-methoxymethylpyrrolidine) of 2,2-dimethyl-1,3-dioxan-5-one, a boron-mediated aldol reaction, a six- to five-membered ring acetonide shuffling, an oxidative