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- W2079671137 abstract "Syntheses of trans-1,2-di-tert-butylpyrazolidine 1, d,l- and semi-meso-1,2-diisopropyl-3,5-dimethylpyrazolidines, 2a and 2b, respectively, have been developed. Activation parameters of the nitrogen inversion in 1 (ΔG≠ = 123 kJ mol−1 at 110 °C, ΔH≠ = 114 kJ mol−1, ΔS≠ = −15 J K−1 mol−1) have been determined. The steric veto of the nitrogen inversion in 2a has been confirmed. Chemical transformations of 1 have been studied, and the crystal structures of 2a·picrate and 2b·HCl determined." @default.
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- W2079671137 date "2007-07-01" @default.
- W2079671137 modified "2023-10-18" @default.
- W2079671137 title "Sterically hindered and completely arrested nitrogen inversion in pyrazolidines" @default.
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- W2079671137 doi "https://doi.org/10.1016/j.tetasy.2007.06.022" @default.
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