- Terpenes and Terpenoid Cmpounds, 14. - Synthesis of Oxygenated Derivatives in the Tetramethyllimonene Series. - New Odorants of the Wood-Ambergris Type
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A practical preparation of TM-α-terpineol (4), cis-TM-β-terpineol (6c), trans-TM-β-terpineol (6t), TM-Δ1,7,Δ8-menthadiene (7), its spirocyclic epoxide (5), and TM-isocryptone (8) is described (TM = tetramethyl).Some of the new tetram
- Hoffmann, H. M. R.,Pauluth, Detlef
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p. 396 - 402
(2007/10/02)
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- Hindered Rotation of the Isopropenyl Group in Substituted Isopropenylcyclohexanes and Identification of Preferred Rotamers by Nuclear Magnetic Resonance. Bent Bonds May Better Bonds
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The series of 2,2,6,6-tetramethyl-1-isopropenylcyclohexenes 2-6 shows hindered rotation of the isopropenyl group, the activation barrier ΔG(excit.) varying from 12.8 to >15.7 kcal/mol.Splitting patterns and chemical shifts of the olefinic protons of the i
- Hoffmann, H. M. R.,Giguere, Raymond J.,Pauluth, Detlef,Hofer, Edgar
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p. 1155 - 1159
(2007/10/02)
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- Homologues of Monocyclic Monoterpenes. Tetramethylated Derivatives of Carvone, Carveol, β-Terpineol, Sobrerol, and Related Compounds
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Epoxidation of tetramethyllimonene (1) gave monoepoxide 2t, which was opened regioselectively to endo and exo tetramethylated trans-carveols 3t and 5t, respectively.The alcohols were further oxidized to tetramethylcarvone (4) and its unstable exocyclic is
- Giguere, Raymond J.,Ilsemann, Godard von,Hoffmann, H. M. R.
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p. 4948 - 4954
(2007/10/02)
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