1: n-butyllithium; diisopropylamine in tetrahydrofuran T=-20 - 0°C; 0.0833333 h; 2: T=-78°C; 3: 2,4-difluoro-1-bromobenzene With 1,1,1,3,3,3-hexachloro-propan-2-one more than 3 stages;
参考文献
The Procter and Gamble Co.
Patent: US6348624 B1, 2002 ;
Location in patent: Page column 10 ;