作者:Pierfrancesco Bravo、Alessandra Farina、Massimo Frigerio、Stefano Valdo Meille、Fiorenza Viani、Vadim Soloshonok
DOI:10.1016/0957-4166(94)80049-9
日期:1994.6
The syntheses of new optically pure poly-halo and poly-fluoro oxiranes 5b-e by addition of diazomethane on the corresponding beta-keto-gamma-fluorosubstituted sulphoxide intermediates, both in keto 3, hydrate 4 or in keto/ hydrate form are described. Syntheses of sulphur-free fluorinated oxiranes 18b-e, beta-hydroxy-beta-trifluoromethyl amine 21d, alpha-hydroxy-alpha-trifluoromethyl-beta-amino acid 24d, alpha-trifluoromethyl-alpha,beta-dihydroxy acid 25d and beta,gamma-dihpdroxy-beta-trifluoro- and -chlorodifluoromethyl amines 26c and 26d are shown as examples of their chemical versatility