A facile one-pot synthesis of 2,3,6-trisubstituted pyridine derivatives from bicyclic ketal by using TMSOMs (5 equiv.)-BF3·Et2O (1 equiv.)
作者:Jong-Gab Jun、Tae Hee Ha、Dae-Whang Kim
DOI:10.1016/0040-4039(94)88032-8
日期:1994.2
TMSOMs (5 equiv.)-BF3·Et2O (1 equiv.) complex was studied for the selective cleavage of bicyclic ketal and a useful method was found for the preparation of 2,3,6-trisubstituted pyridine in good yield. The bicyclic ketal was cleaved and rearranged to 1,5-diketone which was then reacted with nitrile affording pyridine as a sole product in one-flask.
研究了TMSOMs(5当量)-BF 3 ·Et 2 O(1当量)配合物对双环缩酮的选择性裂解,发现了一种有用的方法以高收率制备2,3,6-三取代的吡啶。将双环缩酮裂解并重排为1,5-二酮,然后使其与腈反应,从而在一个烧瓶中提供吡啶作为唯一产物。