Grasshopper ketone (5) and dehydrovomifoliol (6) were synthesized in their natural and optically active forms. Comments were made on the significance of this work in relation to the (S)-stereochemistry of (+)-abscisic acid (3). Unusual selective hydrogenation of the more hindered CO group of 7 to give 9 is recorded.
                                    以天然和光学活性形式合成了酮(5)和脱氢伏米福尔(6)。评论了这项工作与(+)-
脱落酸(3)的(S)-立体
化学有关的重要性。的多种位阻CO基团的不寻常的选择性氢化7,得到9被记录。