Spiroacetal Biosynthesis: (±)-1,7-Dioxaspiro[5.5]undecane in <i>Bactrocera </i><i>c</i><i>acuminata</i> and <i>Bactrocera</i> <i>o</i><i>leae</i> (Olive Fruit Fly)
作者:Brett D. Schwartz、Christopher S. P. McErlean、Mary T. Fletcher、Basilis E. Mazomenos、Maria A. Konstantopoulou、William Kitching、James J. De Voss
DOI:10.1021/ol050143w
日期:2005.3.1
rationalizing the formation of (+/-)-1,7-dioxaspiro[5.5]undecane (5) in the fruit fly species Bactrocera cacuminata and Bactrocera oleae (olive fruit fly) is presented. Incorporation studies with deuterium-labeled keto aldehyde (10), 1,5-nonanediol (11), and 1,5,9-nonanetriol (12), and our previous finding that both oxygen atoms of 5 originate from dioxygen, are strongly evidentiary. The racemic condition
[反应:见正文]提出了一种生物合成方案,合理化了果蝇Bactrocera cacuminata和Bactrocera oleae(橄榄果蝇)中(+/-)-1,7-dioxaspiro [5.5]十一烷(5)的形成。结合氘标记的酮醛(10),1,5-壬二醇(11)和1,5,9-壬三醇(12)的掺入研究以及我们先前的发现5的两个氧原子均来自双氧是有力的证据。解释了天然螺缩醛5的外消旋条件,除其他外,已证明二氢吡喃(18)并不是通往5的重要中间体。