From oxides of internal perfluoroolefins to fluorocontaining camphor thiazolinylhydrazones
作者:Lyudmila V Saloutina、Aleksandr Ya Zapevalov、Mikhail I Kodess、Konstantin A Lyssenko、Mikhail Yu Antipin、Victor I Saloutin、Oleg N Chupakhin
DOI:10.1016/s0022-1139(02)00283-x
日期:2003.3
The reaction of oxides of internal trans- and cis-perfluoroolefins with (1S, 4S)- or racemic camphor thiosemicarbazone leads to the formation of trans- and cis-isomers of (IS, 4S)- or racemic camphor 5'-fluoro-4'-hydroxy-4',5'-di(perfluoroalkyl)-1',3'-thiazolinyl-2'-hydrazones, respectively. Unsymmetrical dodecafluoro-2,3-epoxyhexane yields a mixture of regioisomeric hydrazones. The molecular structure of the trans-isomer of (1S, 4S)-camphor 5'-fluoro-4'-hydroxy-4',5'-bis(trifluoromethyl)-1',3'-thiazolinyl-2'-hydrazone has been established by X-ray crystallography. The quite rare example of cocrystallization of two diastereomers of the latter in homochiral crystal (sp. group P2(1)) has been revealed. (C) 2002 Elsevier Science B.V. All rights reserved.