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。