作者:Daniele Giallombardo、Adam C. Nevin、William Lewis、Christopher C. Nawrat、Russell R.A. Kitson、Christopher J. Moody
DOI:10.1016/j.tet.2013.12.055
日期:2014.2
A synthesis of the naturally occurring xanthone toxyloxanthone B is described, in which the key step is the regioselective addition of a methyl salicylate to a substituted benzyne, followed by cyclization of the intermediate aryl anion to form the xanthone, the regiochemistry of the aryne addition being confirmed by X-ray crystallography. Subsequent introduction of the pyran ring by [3,3]-rearrangement
描述了天然存在的x吨甲苯氧杂恶酮B的合成,其中关键步骤是将水杨酸甲酯区域选择性地加成到取代的苯炔中,然后环化中间芳基阴离子以形成an吨,其中芳烃加成的区域化学是由X射线晶体学证实。随后通过[3,3]重排和脱保护引入吡喃环完成了合成。