The novel furanomycin analogues 8 and 17 were synthesized as mixture of two diastereomers using the gold-catalyzed cycloisomerization of α-hydroxyallenes as the key step. Compared to the traditional use of stoichiometric amounts of silver salts, gold catalysis is much more efficient for the cyclization of highly functionalized substrates.
以
金催化δ-羟基烯环异构化为关键步骤,合成了新型
呋喃霉素类似物 8 和 17,它们是两种非对映异构体的混合物。与传统的使用等量
银盐相比,
金催化在高官能化底物的环化过程中效率更高。