20771-97-5Relevant academic research and scientific papers
Indium-Catalyzed C?F Bond Transformation through Oxymetalation/β-Fluorine Elimination to Access Fluorinated Isocoumarins
Yata, Tetsuji,Nishimoto, Yoshihiro,Chiba, Kouji,Yasuda, Makoto
supporting information, p. 8288 - 8294 (2021/05/21)
Fluorinated heterocycles have attracted much attention in the pharmaceutical and agrochemical industries. Many strategies have already been developed to achieve the synthesis of fluorinated heterocycles. Formidable challenges remain, however, in the synthesis of fluorinated isocoumarin derivatives that are among the most alluring structural motifs. Herein, the indium-catalyzed C?F bond transformation of 2-(2,2-difluorovinyl) benzoates is reported, which are readily accessible compounds, to give a diverse array of fluorinated isocoumarins. The present reaction proceeds smoothly using inexpensive reagents: a catalytic amount of indium salt in the presence of zinc salt. A theoretical calculation of potential energy profiles showed that the reaction consists of oxymetalation with the elimination of alkyl halide and the β-fluorine elimination.
Ortholithiation of unprotected benzoic acids: Application for novel 2-chloro-6-substituted benzoic acid syntheses
Gohier, Frederic,Castanet, Anne-Sophie,Mortier, Jacques
, p. 799 - 806 (2007/10/03)
2-Chloro-6-substituted benzoic acids of the type 2a-h were prepared by the tandem metallation sequence from 2-chlorobenzoic acid 1 with the 1:1 complex secbutyllithium/TMEDA in THF at -78°C followed by quenching with electrophiles.
