1. Synthesis and absolute stereochemistry of marine nor-sesquiterpene austrodoric acid
2. Diastereoselective routes towards the austrodorane skeleton based on pinacol rearrangement: synthesis of (+)-austrodoral and (+)-austrodoric acid
3. Compound 3. 1H NMR (CDCl3, 300MHz): 4.31 (t., 2H, J=6Hz), 2.6-2.9 (m., 2H); 2.15-2.25 (m., 1H); 2.00 (s.,3H); 1.17 (s., 3H); 0.87 (s., 3H); 0.86 (s., 3H); 0.84 (s., 3H). IR (liquid fi lm, cm-1): 1734, 1695. Compound 5. 1H NMR (CDCl3, 300MHz): 5.00 (s., 1H); 4.83 (s., 1H); 3.96-4.15 (m., 2H); 2.02 (s., 3H); 1.10 (s., 3H); 1.04 (s., 3H); 1.03 (s., 3H). IR (liquid fi lm, cm-1): 2925, 1742, 1460, 1364, 1234, 1034, 880. Compound 6. 1H NMR (CDCl3, 300MHz): 4.08-4.27 (m., 2H); 2.03 (s., 3H); 1.14 (s., 3H); 1.00 (s., 3H); 0.99 (s., 3H); 0.97 (s., 3H). IR (liquid fi lm, cm-1): 3460; 2927; 1737; 1461; 1364; 1239; 1142; 1082; 1031. Compound 7. 1H NMR (CDCl3, 300MHz): 3.69 (t., 2H, J9Hz); 1.29 (s., 3H); 1.10 (s., 3H); 1.01 (s., 3H); 0.76 (s.,3H). IR (liquid fi lm, cm-1): 3400; 2932; 2870; 1452; 1386; 1073; 1041
4. Rearrangement of epoxides. Part I. Preparation and rearrangement of the α- and β-epoxides of 14,15-bisnorlabd-8-en-13(R and S)-yl acetates and of related epoxides