A l'aide de la spectrometrie RMN, on etudi le dedoublement optique du bromochlorofluoromethane qui est inclus dans une cavite de compose chiral le cryptophane C
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
Bromochlorofluoromethane and deuteriobromochlorofluoromethane of high optical purity
作者:Thomas R. Doyle、Otto Vogl
DOI:10.1021/ja00204a029
日期:1989.10
Deux methodes de synthese sont presentees, l'une impliquant la synthese d'intermediaires optiquement actifs reagissant stereoselectivement, l'autre se fait par dedoublement optique
Deux methodes de synthese sont presentees, l'une impliquant la synthese d'intermediaires optiquement actifs reagissant立体选择性, l'autre se fait par dedoublement optique
The resolution of 1-bromo-1-chloro-1-fluoroacetone and the preparation of (+)- and (–)-bromochlorofluoromethane
作者:M. K. Hargreaves、B. Modarai
DOI:10.1039/j39710001013
日期:——
1-Bromo-1-chloro-1-fluoroacetone has been resolved into its optical antipodes by means of its ‘menthydrazide’ derivative. The optically active ketones were converted into the active haloforms by use of 9N-potassium hydroxide solution.