trifluorormethanesulfonic acid; triethylamine 1) CH2Cl2, ice colling to r.t., 15 to 20 min, 2) CH2Cl2; Yield given. Multistep reaction;
参考文献
Olah, George A.; Husain, Altaf; Gupta, B. C. Balaram; Salem, George F.; Narang, Subhash C.
Journal of Organic Chemistry, 1981 , vol. 46, p. 5212 - 5214