N,N-Bis(perfluoroalkyl)thiocarbamoyl chlorides (FDMTC-Cls) were synthesized as reagent for the protection of alcohols. Using the crystalline FDMTC-Cls, the FDMTC groups were introduced into the alcohol molecules in excellent yields in the presence of sodium hydride in THF at room temperature. The products were separated from the excess alcohols by solid-phase extraction with a fluorous reverse-phase
Precipiton Reagents: Precipiton Phosphines for Solution-Phase Reductions
作者:Todd Bosanac、Craig S. Wilcox
DOI:10.1021/ol049369+
日期:2004.7.1
Several Precipiton phosphines were prepared and employed in the Staudinger reaction and in the reduction of secondary ozonides. Both amines and aldehdyes were obtained in good to excellent yields and purities. After use of the phosphine, isomerization and precipitation of the spent phosphorus reagent were induced by exposure to visible light in the presence of erythrosin B, a triplet sensitizer. Products were isolated by simple filtration. The use of the triplet sensitizer has the added advantage of eliminating [2 + 2] cycloaddition reactions between trans-Precipitons.
Fleet, George W. J.; Shing, Tony K. M.; Warr, Steven M., Journal of the Chemical Society. Perkin transactions I, 1984, # 5, p. 905 - 908
作者:Fleet, George W. J.、Shing, Tony K. M.、Warr, Steven M.