1: With lithium in diethyl ether Metallation; 2: With iodine in diethyl ether cyclotetramerization; Further stages.;
参考文献
Lu, Ping; Hong, Haiping; Cai, Guoping; Djurovich, Peter; Weber, William P.; Thompson, Mark E.
Journal of the American Chemical Society, 2000 , vol. 122, # 31 p. 7480 - 7486