The reactions of binucleophiles with EDG-substituted styrenes. 6
Mechanistic study of multi-step nucleophilic substitution for trifluoromethylated styrenes
Scheme 6
Judging by their multiplicity and chemical shift values, a doublet at κΆ€46.6 ppm (3J (F, H) = 7.6 Hz) was assigned to enamine 6d and two triplets at -60.7 and -62.2 (3J (F, H) = 10.7 Hz) were attributed to its azomethine isomer 7c (Scheme 6). Then, a new triplet at -60.1 ppm (3J (F, H) = 11.4 Hz) appeared which was attributed to imidazolidine 9a.
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