A regiospecific synthesis of ortho-trifluoromethylated and ortho-(fluoro)alkylated pyridine derivatives has been developed. This strategy is enabled by visible light-promoted vinyl isocyanideinsertions with Umemoto’s reagent and electron-deficient bromides at room temperature. The methodology presented here provides an access to highly functionalized ortho-(fluoro)alkylated pyridine derivatives regiospecifically
α-monofluoro-γ-amino acid derivatives has been developed. This reaction conveniently and efficiently provides monofluoroamino acid ethyl ester-quinoxaline-2(1H)-one derivatives under mild conditions. Using removable amide carbonyl alkenes provides an efficient strategy for the preparation of various α-monofluoro-γ-amino acid derivatives. This strategy has the advantages of metal-free, mild conditions, simple
671. Organic fluorine compounds. Part XXII. Fluorine analogues of mevalonic acid
作者:Ernst D. Bergmann、Sasson Cohen
DOI:10.1039/jr9610003457
日期:——
Synthetic routes for a variety of halogenated (chiral) acetic acids from diethyl malonate
作者:Manuel R. Mazenauer、Stole Manov、Vanessa M. Galati、Philipp Kappeler、Jürgen Stohner
DOI:10.1039/c7ra09727a
日期:——
acetic acids often serve as precursors. We focus on a syntheticroute to synthesise chiral halogenated acetic acids with F, Cl, Br, and H/D isotopic substitution at the α-C-atom starting from diethyl malonate. This reactant is easily available, cheap and allows the obtainment of target acids in a few reaction steps with great versatility. Among all of the possible fully halogenated acetic acids (more