Synthesis of furo[2,3-b]pyridin-4(7H)-ones and related quinolinone via Brønsted acid-promoted cyclisation of alkynes
作者:Emmanuel Bossharth、Philippe Desbordes、Nuno Monteiro、Geneviève Balme
DOI:10.1016/j.tetlet.2008.11.073
日期:2009.2
that are dealkylated in situ to provide the corresponding furo[2,3-b]pyridin-4(7H)-ones. The same strategy applies to the formation of furo[2,3-b]quinolin-4(9H)-ones. In the case of Me3Si-substituted alkynes, hydration of the triple bond was observed.
ñ -烷基-4-烷氧基-3- alkynylpyridin-2(1 ħ) -酮容易经历酸促进的5-内-heteroannulation到furopyridinium中间产物在原位脱烷基化以提供相应的呋喃并[2,3- b ]吡啶-4(7 H)-ones。相同的策略适用于呋喃[2,3 - b ]喹啉-4(9 H)-ones的形成。在Me 3 Si-取代的炔烃的情况下,观察到三键的水合。