Site-Selective Oxidation and Metal-Induced 2-Propynylation of Pyranose Derivatives en route to Tetrodotoxins
作者:Ricardo Alonso、Lidia Ozores、Fernando Cagide
DOI:10.1055/s-2004-835651
日期:——
The radical-based site-selective oxidation of 2-hydroxyethyl acetals and the metal(Zn,Ti)-induced 2-propynylation of aldehydes can both be carried out successfully on highly functionalized oxygenated substrates, as demonstrated in the context of a synthetic plan for tetrodotoxin and its analogues, for which promising synthetic intermediates were prepared from d-mannopyranoses.
基于自由基的2-羟乙基缩醛的选择性氧化,以及醛类在金属(Zn、Ti)诱导下的2-丙炔化反应,均能在高度官能化的含氧化合物底物上成功进行,这在一项关于河豚毒素及其类似物的合成计划中得到证实,其中,有希望的合成中间体是从D-甘露吡喃糖制备的。