Absolute configuration of phytocassanes as proposed on the basis of the CD spectrum of synthetic (+)-2-deoxyphytocassane A
作者:Arata Yajima、Kenji Mori
DOI:10.1016/s0040-4039(99)02060-2
日期:2000.1
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. (C) 2000 Elsevier Science Ltd. All rights reserved.