A variety of functionalized 3,4-benzo-7-hydroxy-2,9-diazabicyclo[3.3.1]non-7-enes were prepared by one-pot cyclizations of 1,3-bis(silyl enol ethers) with quinazolines. The mechanism of the cyclization was studied by B3LYP/6-31G(d) density functional theory computations. The products could be functionalized by Suzuki cross-coupling reactions. The reaction of 1,3-bis(silyl enol ethers) with phthalazine afforded open-chain rather than cyclization products.
通过1,3-双(
硅烯醇醚)与
喹唑啉的单锅环化反应,制备了一系列功能化的3,4-苯并-7-羟基-2,9-二
氮杂双环[3.3.1]诺烯。环化的机制通过B3LYP/6-31G(d)密度泛函理论计算进行了研究。产物可以通过铃木交叉偶联反应进行功能化。1,3-双(
硅烯醇醚)与
邻苯二胺的反应则产生开链而非环化产物。