作者:Takumi Furuta、Miho Nakayama、Hirotaka Suzuki、Hiroko Tajimi、Makoto Inai、Haruo Nukaya、Toshiyuki Wakimoto、Toshiyuki Kan
DOI:10.1021/ol900689m
日期:2009.6.4
The regioselective synthesis of chafurosides A (1) and B (2) from the same methyl ketone 5 was accomplished using a novel protecting group strategy. Both flavone rings were constructed from beta-diketone intermediate 4, which was readily obtained by condensation of an acyl donor and ketone 5. Construction of the dihydrofuran ring was achieved via an intramolecular Mitsunobu reaction.