p-methylbenzenesulfonyl (tosylate); tetrabutylammomium bromide in tetrahydrofuran Inert atmosphere;
参考文献
Wengryniuk, Sarah E.; Weickgenannt, Andreas; Reiher, Christopher; Strotman, Neil A.; Chen, Ke; Eastgate, Martin D.; Baran, Phil S.
Organic Letters, 2013 , vol. 15, # 4 p. 792 - 795