1: 9H-fluorene With sodium hydride in tetrahydrofuran; mineral oil T=10°C; 1 h; 2: formic acid ethyl ester in tetrahydrofuran; mineral oil T=20°C; 2 h;
参考文献
The Asan Foundation; YOO, Sung-eun; SUH, Jeehee
Patent: EP2562156 A2, 2013 ;
Location in patent: Paragraph 0067; 0068; 0069; 0070 ;