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Absolute configuration of phytocassanes as proposed on the basis of the CD spectrum of synthetic (+)-2-deoxyphytocassane A

2000; Elsevier BV; Volume: 41; Issue: 3 Linguagem: Inglês

10.1016/s0040-4039(99)02060-2

1873-3581

Arata Yajima, Kenji Mori,

Plant biochemistry and biosynthesis

Phytocassane A–E possess ent-cassane skeleton because synthetic (+)-2-deoxyphytocassane A with cassane skeleton showed the Cotton effects positive at 369 nm (due to the ring-C dienone chromophore) and negative at 289 nm (due to the ring-A carbonyl group), while the natural phytocassane A exhibited the opposite Cotton effects.