Synthetic Methods and Reactions. Part 106. Suppression of anchimerically assisted rearrangement products in the synthesis of ?-fluorocarboxylic acids from ?-amino acids with 48:52 (w/w) hydrogen fluoride/pyridine [1]
作者:George A. Olah、G. K. Surya Prakash、Yah Li Chao
DOI:10.1002/hlca.19810640806
日期:1981.12.16
Anchimericallyassistedrearrangement, observed in the fluorination of some α-amino acids with 70 : 30 (w/w) hydrogenfluoride/pyridine (by weight) in the presence of NaNO2, is substantially or fully suppressed by using the less acidic reagent 48 : 52 (w/w) hydrogenfluoride/pyridine.
α-Monofluoroalkanoic acids are important intermediates in the synthesis of biologically active fluorine compounds. General methods of preparation have been examined, based on the three following reagents: (a) hydrogen fluoride + N-bromoacetamide; (b) diethyl monofluoromalonate; and (c) perchlorylfluoride. The first of these is the recommended procedure for simple unsubstituted α-fluoro acids; however, the
作者:Doak, Bradley C.、Whitehouse, Rebecca L.、Rimmer, Kieran、Williams, Martin、Heras, Begoña、Caria, Sofia、Ilyichova, Olga、Vazirani, Mansha、Mohanty, Biswaranjan、Harper, Jason B.、Scanlon, Martin J.、Simpson, Jamie S.
DOI:10.1002/cmdc.202300684
日期:——
We report that the oxidoreductase enzyme DsbA can turnover thiol-reactive functional groups such as fluoromethyl ketones and maleimide.
我们报道了氧化还原酶 DsbA 可以翻转巯基反应官能团,例如氟甲基酮和马来酰亚胺。
Synthetic Methods and Reactions XII<sup>1</sup>. Preparation of α-Fluorocarboxylic Acids from α-Amino Acids via Diazotization in Polyhydrogen Fluoride/Pyridine Solution.
作者:George A. OLAH、John WELCH
DOI:10.1055/s-1974-23388
日期:——
Synthetic methods and reactions. 63. Pyridinium poly(hydrogen fluoride) (30% pyridine-70% hydrogen fluoride): a convenient reagent for organic fluorination reactions
作者:George A. Olah、John T. Welch、Yashwant D. Vankar、Mosatomo Nojima、Istvan Kerekes、Judith A. Olah