作者:L. V. Saloutina、A. Ya. Zapevalov、M. I. Kodess、V. I. Saloutin、O. N. Chupakhin
DOI:10.1023/a:1013887515644
日期:——
Epoxy derivatives of internal fluoroolefins (both cis and traps isomers) react in a stereospecific manner with (1S)- or rac-camphor thiosemicarbazone in a polar aprotic medium to give the corresponding 5-fluoro-4-hydroxy-4,5-bis(polyfluoroalkyl)thiazol-2-ylhydrazones. From unsymmetrical 2,3-epoxydodecafluorohexane a mixture of regioisomeric hydrazones is formed. According to the H-1 and F-19 NMR data, the resulting traps-hydrazones in (CD3)(2)SO and CDCl3 exist as mixtures of diastereoisomers occurring in a dynamic equilibrium.